Need prosthetic front paws for border collie foster

[Nancy497]

This is Eddie, my foster border collie. He was born without ears or front paws and his two front legs are different lengths. He has a pad on the bottom of each stump so he is able to walk. However, he can only walk on grass (not hard surfaces) for short times, or else the pads get sore and bleed. He generally sits up like this or lies down because standing is not comfortable for him with the two different length legs. He has been shuffled amongst multiple shelters and foster homes all his life and no one ever thought he was capable of being a "real" dog. He now loves to go for walks, but we only let him walk so far and then put him in a stroller to avoid stressing his pads. He tries so hard to keep up with my other border collie. I would love to get him some prosthetic feet to allow him to run and play with abandon. He so deserves a happy ending. I have no idea how to go about this. Any suggestions or assistance would be appreciated.