Motorcycle Repair: cl350 engine parts, stud bolts, rubber pieces

Question
Hello,
   I have two seemingly simple questions but I don't know. They are about a 1972 honda CL350. I need the stud bolts that stick out of the cylinder head for attaching the exhaust. I know honda doesn't make them anymore and they are an irregular size (8x58). Do you have any leads? I think ebay has them for like $20 at the moment. other question - I was replacing the cam chain roller and I lost one of the little rubber pieces that holds the roller assembly in place (the ones that the shop manual says to be careful about). They are the bits that are on either side of the roller assembly. I was wondering if you had any tips for getting them out of the crankcase (I think) that it fell into. I can't see it in there. I tipped the engine to try and get it out of the oil plug. I don't know if it can even get out through there. Would it be fine to run the engine with the piece in the crankcase? doesn't seem like a good idea.

Answer
Honda makes an amazing amout of stuff for these bikes, still...try the dealer. You could use 55x8mm bolts but it would look bad. 20.00 for nos eom studs ?? maybe just do that.... there are a million and 30 of these bikes in every backyard, try getting them from an old parts bike, if you can remobe them from the head !
That bike has no pan to remove so the easiest way would be to remove the clutch cover and try to get the part from the right side of the engine ...yes the part needs to be retrieved !
It will get eaten up and clog the top end oil passages.
Fun !