you can't be looking to hard.  lower pinch bolts are easy to get.  order them from suzuki, not expensive either.  $3 a piece.

09100-10225  bolt need 2

08321-0110A  lock washer  need 2

should be no more than $10 for all 4 parts.  if you already have all the parts this is the cheapest way for you.   fastenall is a rip off.  over priced and have to buy in lots of 10 or more.  thats how the place near me is. 

you have to use the correct bolt with a body.  a bolt with full theads is not strong enough to hold the joint.  the body of the bolt fits in a recess in the joint which keeps the joint from falling out.  i used a threaded bolt years ago and the joint would keep falling out.  the theads are not hard and wear. not a fun experience going over the bars.