You can get frozen sides of smoked salmon at Connelly's seafood for 10.95 per pound. They have two pound sides, and also 8 ounce trays but I think the trays are all tails from filleted fish.
the sides come in sliced and unsliced. I prefer to slice them myself, much thinner than they do. I think it brings out more flavor. The sliced sides will say 'presliced' on the package, and the unsliced come in the same package with the word 'presliced' covered with a sticker.