Vincent Van Cat needs to have his leg amputated

Vincent Van Cat, our sweet little cat we've had since he was a kitten, has a soft tissue sarcoma in his back left leg. According to the vet, the prognosis is good if the leg is removed. He's only 6 years old now, so with this surgery he can have a long and happy life ahead of him. We'd intended to bring him to a low cost clinic, but their wait list is months long, and he needs surgery fast before the sarcoma spreads. The lump on his leg went from grape size to kiwi size in a matter of weeks.

Any help you could offer would mean more than you could possibly know.