Oscars expenses fund

Hi as all my friends know one of my cats Oscar has been in the vets for a week now with a kidney stone and unable to wee. He’s had two surgeries and currently has a catheter in his bladder which hopefully can come out soon and he can come home . Although he is insured he will now need a special diet which is expensive £19 for a small bag of biscuits and £12 for the wet this would last him approximately ten days ish. This may not be covered by insurance and I want to do my best for him but it’s gonna be tough as I have no spare cash . So if anyone loves animals as much as I do and feels they could help Oscar in any way we would both be eternally grateful. He thanks u in advance too meow ????