There are a few firms listed in the Dog papers - you should be able to find some by using a search engin too. Make sure that the frame has a door in it so you can remove your dogs should you be unfortunate to have a rear end shunt.
Try
http://www.habornproducts.co.ukhttp://www.dogcages.uk.comhttp://www.trystorme.co.uk Think this one is in Scotland
Sorry I can't make this link thing work - someone help me please.
Jackie H
Jackie,use the edit button then you can see what you left out
;-)