Thanks for the help 9psi EB.
I realise it probably would've been easier/cheaper to use aftermarket but I have the thing now, so I might as well try to install it properly.
joelburden: Bolting the thing in was relatively easy. Sundeep actually did all the work, but I didn't hear him complaining too loudly so it couldn't have been that difficult
Working out how to wire it all up is the hard part. I have no idea how much a wrecker would charge, as I purchased mine from a fellow forum member.