Right, thanks for your replys guys, got me on step closer, seems http://www.bpfonline.co.uk/show_product.asp?id=730 have one but wrong size again so going to drop them an email to those two company's.
Did have a look on ebay but never come up with anything.
Could the protective pad inserts for things like the bottom of square metal tube table legs be & adjusted ) by cutting out some of the pad with a sharp craft knife from inside a hole drilled right through the pad ?
Try this website " rosshandling.co.uk/plastic-fittings-pages.asp" and look into the part that refers to square inserts , the lists appear to give some exact specifications .
Failing that .. some of the guys on here who are into casting might be able to help by making a wax form , cast it in aluminium and then cut & shape to size etc...
You can only ask & be told " Yes or go away " or words to that effect.