One of my guys at work said to me today:
"Ere Nasher, you've been looking at bits to make some springy seats for your boat, there's some brand new ex police speed boat ones on Ebay at the moment for a Ton each".
I rushed off to have a look and they weren't quite what I wanted
But could be of some use to somebody.
BRAND NEW MECHANICAL PILOT/PASSENGER SEAT. (1) | eBay
Nasher.