Here's a Bleeder and Zerk Rubber Cap I Can Recommend--Allstar 50855

[Bob K.]

My original rubber bleeder caps finally bit the dust. I also noticed I had no caps on any of the grease zerk fittings under the bike.

 

I can recommend the Allstar 50855 for both. https://www.amazon.com/gp/product/B009Q76TVW/. They're long enough to easily cover the brake bleeders. They're also long enough to cover the short grease zerk fittings all the way over the wrench flats on the zerk. They're a tight fit and take quite a bit of effort to get on or off.