If you go into the cabin to theleft when you come out of the Rila theres a ski depot that might do it for you. Can't promise anything and i dont know any prices. There's another inside the Rila follow the signs to the gondola and you should find the Inghams ski depot. They MIGHT do it, but again, I dont know any prices!
Ask Christo at the White Magic Bar. Last time we were ther he had workbench set up in bar preparing his daughter's skis for a competion the following day. He's a great bloke!! I will be in there on 5th Feb. YES!!!!