where can i get my casset lift overhalled?

[mous3]

I have a large cassette lift in my camper that we got of eBay it dose work but its in a right state so where in or near London Uk can I get this big beasty overhauled in the next 4 weeks it sits inside my transit jumbo so getting the van off the ground is not required so far I have found no one who is willing to do the work and the clock is ticking as I will be unable to get my new chair in and flooring for the camper down in time for going to my sisters wedding when I need to live in the van for the week.