At last, I have a batch of them completed:
These are made to Michael Good's design from Metals Technic; dimensions of the small stakes are 185x40x13mm thick; the larger ones are 230x50x20mm thick for forming larger forms.
For those who are wondering what these are, take a look here - or for some more advanced forms, here.
I have 4 large and 2 small on offer; the large ones are £32.50 + £3 postage each, the smaller ones £25 + £2.50 postage. Obviously, I'll combine postage where needed.