Motocicli Veloci in Italy has - for sale on their site right NOW - replica Ceriani forks with all Cartridge internals. GORGEOUS stuff. IIRC they might have 'em in 38mm too, unless that's just the yokes. They've got more awesome stuff than Disco Volante, IMHO - both sites are worth checking out for new reproduction Unobtainium.
There's also a CR750 replica builder on FACEBOOK of all places, whipping up nice CR or RCB replica pegs. Worth checking out while you're on facebook looking at the '76 RCB rebuild with it's thousand of deeply anatomical close-up pics.
Probably the best site for inspiration is that guy's collection of vintage race-bike especially RC-series photos, I think it's VF750FD.com or something to that effect. Of course those are factory bikes not aftermarket. But IMHO modern reproductions of vintage factory works parts ARE "aftermarket" - they're "waaaaay-after market" ha-ha.
Seriously though, any of you folks into the Ceriani forks need to check out Motocicli Veloci!
Some very cool new production Borrani rims especially their 3.00x18" - I bought a rim in that size a while back, assuming it would be a non drop-center shouldered type rim, like a regular WM3 only wider - we've all seen the photos. Motocicli Veloci USED TO carry 'em like that. Well, I cheaped out and got one off eBay, turned out that on WAS a drop-center shouldered rim - well if that's what I was gonna get, I should've got the actual Borrani rim! Pretty cool stuff IMHO - you'd see 'em on the likes of the mid '70s TR500 TR750 & TZ750 factory team racers. Before they got into the mag wheels, so more like TZ700 come to think of it. There's that famous dual-duty TZ700 which got rebuilt with different heads between races and ran as a TZ500 and then as a TZ750 in the same day - who rode it? Jack Findlay or something? Won the championship for Yamaha on a non-sponsorship bike. Or was that what he did for Suzuki THEN he got the Yamaha ride? I don't know - I'm into the BIKES, not the riders! Either which way, the 3.00x18" Borrani rim on the TZ700 rear hub is truly awesome - of course the rest of the bike is pretty hot too, but looking at the bike and picturing leaving it chained to the fence with everything not welded down stripped right off, the wheels are the first parts that I'd steal. Ha-ha.
Betcha they've got a metal detector when you leave the Barber Museum, hey?
The Ceriani forks on Motocicli Veloci are pretty cool, but so long as they're still just 35mm tubes I'm not that impressed. Maybe on the KZ440LOL, but the stuff I lust after for MY bike would be like - the Showa TRAC antidive forks off the '85 NSR500 - now THAT would suit a DOHC four quite nicely. I lieu of that, I lust after some decent 41mm TRAC forks off a Goldwing. Preferably the 1500, but I'd make do with the 1200 version in a pinch. VF1000R had some decent 41mm TRAC forks too. But the GL1500 version looks like it has more potential IMHO.
I suppose - as soon as I think about the AHRMA rules limiting "Forgotten Era" Superbike forks at 43mm, and of how unattractive all of the 43mm CBR parts are from my own perspective - not period-correct looking enough - as soon as I think of that rule the original 43mm forks come to mind.
HARRIS - HARRIS MAGNUM - Harris Magnum ANYTHING. CB900F Magnum-1 or Magnum-2 chassis? OH BOY.
But if nothing else, the 43mm Harris forks & yokes!
Did I mention this already? It's stuck in my mind, and will remain there so long as I've got the stock 39mm forks on my 900, and a matching pair on the KZ440LOL ha-ha. What's that song "Skinny Legs and All"?
-S.