If it's any help, I'm sure all the 360 variants used the same clutch push rod.
It wouldn't surprise me if some other model's part fit - take some measurements and post it here.
Other members can check what they have on hand and maybe come up with something.....
You can get a Vesrah gasket kit here for $40 -these are good folks, but they don't make the gaskets remember.....
http://www.crc2onlinecatalog.com/Index_Main_Frame.htmI think the seal is 91203-292-005, which should be available from Honda (I think)........it's used on literally dozens of models - all 5-speed 450, all (or most) 350/360, 500F, 500T, blah, blah............