Help Lula the cat walk again

Lula is 7 years old and was rescued from a cat shelter when she was 1. She had a hard life at the start and came to us in a bit of state. Slow to trust, she eventually came out her shell and found happiness.
Unfortunately she was in a hit and run incident which has left her back leg fractured. Our vet plan will not cover the cost of the surgery which is expected to be a minimum of £1500 which has come at the worst possible time as me and my wife are expecting our first child.
Please help in any way you can.. this little cat has brought so much happiness to everyone who meets her.
Thanks.
Tom and Josie