I think I might have found one on ebay. It looks shorter in the picture. Give them a holler and see if it the one you are looking for.
for some reason I cant paste the link in this reply. I just typed krinkov in the search bar and it was one of the first few items.
The vendor is: tc-tactical, Now that I looked at the K-var link you provided it might be the same one.
OK one more time. AA-OK has the one you are looking for 2.5" length, but I have always been a little leery of them for some reason. Maybe worth giving them a call.