thanks for all the help so far.
the bike is an 83. in the parts diagram they dont show a cap available. so not sure.
the reason i decided to replace them was because the float needle removed had the standard rubber tip, and the NEW needles are all metal. So i felt like Id rather have the corresponding new seat. (plus i didnt anticipate it being a big deal)
im going to drill them this weekend, but i just wanted to have a simple solution for replacement caps