I have not seen them in stock anywhere. I contacted PTR and this was their response:
Sir we continue to manufacture most of our product line at the moment. They are a bit difficult to find, given how quickly things are being picked up in the market place.
This is a list of some of our distributors. These distributors are located throughout different parts of the USA, but will be able to ship to any FFL in the USA.
These are just a few to aid you in the search for the product you are looking for. Hope this list helps you.
A forum dedicated to and laser-focused on Heckler & Koch firearms, Heckler & Koch accessories and the owners and enthusiasts that love them! Come join the discussion regarding HK pistols, long arms, NFA arms, HK accessories, HK history and trivia and more.