Help archie to get his surgery

Our beloved Archie has to get an unexpected surgery done.  His surgery that needs to be done is a Cranial Cruciate Rupture. And is needed as soon as possible since he can't walk on his back right leg.  His back leg needs a removal of the a damaged cartilage, replacement of a torn ligament and a tightening of a joint tissue This procedure is expensive, but with getting this surgery done he will recover and get back to the way he was as our family dog.  Of course we need to get it done because he can't go on like this without it. Anything will help us out a great deal.