Classic usually has the 5's and 10's but they are OOS at the moment
https://www.classicfirearms.com/vepr54r10mag
Atlantic also has them in stock.
http://www.atlanticfirearms.com/component/virtuemart/shipping-accessories/vepr-7-62x54r-10-round-magazine-2-pack-detail.html?Itemid=0
Ultra set up is the Leatherwood CMR AK7.62 with a Midwest Industries SVD 30mm mount love it on the type II 16.5 Vepr 7.62x54R
http://www.midwestindustriesinc.com/index.cfm?fuseaction=category.display&category_ID=1245...