Please help me with surgery costs

Hey, my little kitten sweep was in an accident on Saturday 1st March and after searching all day for him, he finally returned with his foot hanging off his leg.

He has multiple fractures and needs a skin transplant!

The options are either amputation of his little leg which is going to cost £2000. Or full surgical treatment from £5000!! I do not have insurance unfortunately so I have been advised to look for additional support. If anyone can please help me with medical costs for sweep, we'd greatly appreciated it :( otherwise I may have to make the horrible decision of putting him to sleep. Lesson learnt, get insurance. I feel so ashamed to ask but im desperate for him to be home with us.