The results of a number of clinical trials suggest that autologous stem cell transplants are a promising approach for treatment of MS. My understanding is that this is still at the experimental stage. See Stem Cells in MS : National Multiple Sclerosis Society.

Personally I would need to know a lot more about the Russian entity (How long have they been operating?, Have any results been published in the peer-reviewed medical literature?, etc) before deciding whether or not to spend £20K.