Bought this off here a while ago.
It was advertised as an early bay seat but think it may be from a late bay.
Anyway I added the runners to it (from JK) and it will bolt to any flat surface.
It's in excellent condition.
Price is £100 which is what I paid for it without the runners so you're getting them for free.
I'm travelling from Carlisle to Birmingham on Sat 21 Oct so could meet anyone on route down the M6 if that helps.