disabled. help please

i am 70 with severe osteo arthritis and ashma. for a while i had to use a wheelchair but have fought back and now use a stick and mobility scooter as i cannot walk without pain ,this is 24 hrs a day ,serated ankles lack of cartaledge in knees hips and shoulders but i refuse to do nothing and because i like sea fishing and cannot get down beach ,i saved and sold all i could to raise £1600 for boat with 30hp outboard, the reason i need help is the engine has broken down and because it is 1990 parts are hard to come by so sold for spares and am trying to get a 25-30hp longshaft remote with power tilt and electric start.can get a new one forabout £3500 to 5000.if i could get some one to donate an engine or sponser me that would be great. my boat is moored on a pontoon 5yards from my car once on board i can sit and enjoy my seafishing down the channel. i have no way of raiseing this sort of money so cannot get out very easily now , i have small outboard but its just a standby and low on power my boat is 15ft long with small cabin. thankyou for reading this.over the years have raised thousands for a new scanner ,childrens ward and special care baby unit for then my local hospital the horton Banbury,oxon some time ago now and have never asked for help for myself till now, my condition is progressive so have to make the most of anything i do now. thanks for your time reading this .mike i do still have reciets for all the money i raised for the hospital. this is a very genuine request for help.