DSF

I am now on my 2nd laminator both are manual ones like the ones signzworld sell but both have failed on one side buckling the casing as if the metal is too thin to take the pressure.

I have found an electric one new online from https://www.printcutandfinish.co.uk/pro ... tor-650mm/

but if anyone here has one sat gathering dust I would rather purchase from a member here.

Never used an electric one, but I have bought two of the manual ones from the company you linked too.
Both work well - the latest one had the adjustment mechanism made from cast metal so there are none of the problems you mention. The original one was plastic, but still ok.
Might be worth giving them a ring to ask if their current stock is metal or plastic.

I recently sold that exact same model! I say sold, pretty much gave it away Sorry....not much help to you.