sponsorship for london marathon

Hi, can anybody or business help with sponsorship, I'm running the London Marathon in April for CHILDREN WITH LEUKAEMIA and looking to raise 2-3000k.

I'm 65 and used to run a lot of marathons, half's and road races. I last run the London in 1987 in 3hrs 26mins,and was due to run again in 1989 but had an accident at work which meant I could not run again.Over the next few years I gained a lot of weight and reached 18.5 stone,in May 2008 I started weight watchers and in 10 months lost 5 stone.So although I am still disabled I decided I would try to fulfil my goal to do the London Marathon one more time. Thank you for reading this.

Jim Coyle