Here's a Yak-1; there are several photos of this same aircraft. Here are 5; I might have one or two more, although these are the best ones:
I don't know if this is the same aircraft (no bort number visible), but it's a good, high-resolution detail shot:
The aircraft in these photos is attractive for a model because:
(1) The aircraft is camouflaged, not just overpainted in white winter distemper
(2) This aircraft has RO-82 rocket launching rails under the wings
(3) Photos show both sides of the fuselage
(4) Some details of the camouflage pattern are visible
(5) Details of the ski installation are visible
John