Yes on the first.....
.... but a good luck to you on the second part of your posted inquiry.
I've used Heitt red buffers in all my Beretta 92/96 pistols for IDPA and IPSC/USPSA competition. Never a buffer related failure of any type and they lasted the longest of any of the poly type buffers I've ever used.
On the second part, Heitt has been out of production for some time now. I do run across a few at smaller shops at times and if they're for the Beretta models, I buy every one they have. You didn't say what model pistol you were trying to find these puffers for? Good luck in your search!