Concrete footpath formwork ??

I'm looking to source some interlocking steel formwork for pouring 100 - 150mm concrete footpaths , which I do on a regular basis and currently use lengths of 5" * 2" timber (which of course is unsustainable) . If any of you can give me the name of a supplier anywhere in UK or Ireland for such products , I'd be very grateful.

Cheers

steel merchants? or see item 4

Steel Merchants !! ... Thats absolutely brilliant !! Would never have thought of that one ,... because ,of course ,this is the type of specailty product that all steel merchants would stock in huge quantities ! Thanks.

As for your reference to item 4 , I've searched exhaustively for such products through the normal channels without success and therefore I reckoned that since quite a few tradesman post on this website , they may have some helpful information to offer.

Yet again , thanks for your contribution , it really was a valuable use of your time.