Can't remember the name of the company, but it was one of their main dealers, I'll try and dig it out (couldn't find it quickly when i posted earlier).
Cost was something crazy like £16+vat + dely - bit expensive for a piece of plastic! but I guess it was a marine part
but it does the job very well.
Stainless bracket was £20 from Marine Superstore in Port Solent (£40 in aladdins cave!), althought to be fair a small bus bar was £8.00 in aladdins cave at £25.00 at marine superstore. (very same item).
The only thing about the hinged stainless bracket is that the bolt wasn't long enough to fully lock into the nyloc nut - doesn't seem to make a difference though and of course bolt is not std metric! so maybe difficult to find longer replacement - maybe the reason for the £20 difference