K-VAR shows out of stock, but I have called on out of stock items and found out they did have some after all. YMMV
SKSMAN.com usually has some, but his site says "Temp Out". It says on his website that a 5 rounder can be made into a 10 rnder by using a tapco follower at the bottom of his AK mag page. I am not sure if you would be interested in using the 5 rnder + the Tapco follower, but it is an option if KVAR is really sold out.