Did you try recovering this yourself fist, just to check if you could do it. That'd have been a good start. Also, how long was the computer getting fixed? Is it possible the store owner took the files and overwrote them somehow without effecting the disk too much.
Unless the .key files have a similar signature to the .wallet or .info files then it probably won't be worthwhile recovering those wallet files as you say.
yes i tried to to that but nothing worth. The computer was repairing like 15 days or so . They said it had a HD failure so they changed the HD and put another one. They gave my mother an external drive with some files that she wanted... (pics and shit) but no wallet.
so what im guessing here is that the people who repaired the Computer kept the HD to see if they could get the BTC or just they threw it away..
Thanks for you opinion tho!