Here's a site I found which offers a large selection of paint masks, heavily oriented toward VVS aircraft:
http://www.photoka.info/t-ussr/index.htmThe left-hand column is canopy masks which include national insignia; the third column is individual aircraft marking masks for those who'd prefer to paint rather than apply decals. I haven't made contact with the site owner to determine prices, etc., yet, but I'll update the thread when I get more details.
(By the way, does anyone have a Maquette 1/72 Yak-7A they'd like to sell?)
John Thompson