Find out what size your forks are and then look for used clip-ons from other makes or models of the same size like VFR or what have you.
The problem with that Unky Ernie, is that all the CB750 forks were 35mm dia, and modern bikes are much larger dia. Even those with conventional forks, as opposed to modern "Upside Down" forks that can be upwards of 50mm. If you can locate a set of modern clip ons you could get some "shims" machined to make up the fit, but they won't look right.
I personally never liked the "clubman" bars, they look like a compromise, and I hate compromises. Raask make a good copy of the brilliant Laverda Jota bars in either black or chrome, and these things look tough, and are multi adjustable. I had a couple of sets and sadly sold them. I wish I had a pair now, they're much more attractive than "Clubman" bars, and you can keep your original headlight brackets and not have any clearance issues like you will with clipons.
Also, once your poor ol' back starts singing a sad song because of the stretch forward (exacerbated of course with no rearset pegs) you can adjust the RAASK bars to a more comfortable position. Cheers, Terry.
