I don't know about those Mick; wish he'd offered them to me!
Re the standard No32 brackets, Peter established that they were made from either white or black heart malleable iron. I think Dalgleish used one type & Rose Brothers the other, though I can't remember off my head which way round it was.....pretty sure it's in his book. I started getting my reproductions made in the winter of 1989/90, & made around seven batches approximating to 600 to 700 brackets in all, deciding to call it a day only three or four years ago, when the last batch had all sold. I believe Fultons have been marketing some recently that were made from my moulds. The reproductions were made from cast steel, but were perfectly malleable enough not to shatter with the repeated shocks on recoil. Nigel helped me get the castings done through business contacts on the last couple of batches. We could never compete on price once the Pacific Rim brackets started to appear.........but I hope we did on quality.