Hi, I had one fitted last year it was a complete bummer but luckily the insurance paid up (only after a very worrying time).
Check out this thread
There are some really cool people on here who are keen to help and some who are a complete waste of a good pair of underpants- check out thread #15.
In the end I used a local workshop (to me), CTC Marine and Leisure
01642372600 and ask for Lyndsey he is really good, he may be able to source one and send it down to you?
I was up and running within a couple of weeks.
From memory the price was about what you have been quoted.