Welcome to the site

Their are allot of places you can look for seat ideas, this site being a big one.
ou can check out Carpy's cafe site at
HTTP://WWW.CB750CAFE.COM as h sells lots of "cafe" parts, like custom seats, patches, etc.. Or just GOOGLE "cafe" or "cafe racer seats" and see what comes up (allot I am sure).
I have been thru two sets of bars on my bike thus far. When I bought the bike it had some nasty bars on it, which I called mini apes. Then I went to a lower "superbike" ar, andnow I have a set of clip-ons which are mountd above the top triple-tree to help my achin back. The bike (as it sits now) is actually really comfy to ride..A lower seat will just add to the comfort, as well as a set or rearset controls (near future)...
Stock bars

SuperBike bars

Current Bars

Good luck on your build ,and keep us posted.....