Are you referring to the breather bolts that go thru the factory A/C back plate and into the heads, part #15 in diagram? If so, part # 29465-99 which should be available at your dealer or any number of online vendors.
~

 

 

 

Hmm, you might have an aftermarket A/C breather setup on your bike. If so, you'll have to identify the mfr/maker and check their replacement parts list. Hope it works out for you.
~

 

What you're describing sounds like a "Horseshoe Breather" assembly, which I have as well. Does it look something like this? If so, they're readily available from all the big aftermarket providers (JP Cycle, Drag Specialties, Custom Chrome, etc.). Maybe someone sells the individual components, but I dunno...

 

 

If you need to replace that, you might want to rework your breather so it doesn't feed oily air directly into your airbox.

Showing these only for example:

If you want to be environmentally friendly, you can install a separate catch can and vent that back to your air cleaner.

 

The horseshoe-style vent systems do vent externally, so if that is indeed what the OP has, he's already good to go in that respect. But I certainly agree that's it's the right way to go!