Need custom parts resources

Looking for these items for a 73 CB750K, most of the "links" section are dead, and all the online parts places have only stock replacements.
Looking for:
-larger than stock rear sprocket (stock is 48, need 49 or 50)
-heavy-duty clutch kit (kevlar?)
-quality jet kit
-"ear" style headlight mounts
-clip-on bars

Any help is much appreciated! <img src=icon_smile_shy.gif border=0 align=middle>