Albert needs an operation

Hi my beautiful cat Albert is 15 and very loved. He is healthy and still loves to be outside. Unfortunately, he went out and somehow injured himself, dislocating his hip. He dragged himself home, but he now needs an operation which is costing £2500. As a retiree on pension I’m going to find it impossible to pay , but I don’t want to have him put down. I am hoping some kind people could help.