Cough! Getting back the original thread; Wylex, Crabtree (same group), Schneider, Hager & MK Electric are all offering their new 'Amendment 3' domestic consumer units. I'm not sure I would include any others IMHO. My local wholesalers usually stock from all these manufactories, but only have Wylex currently available off the shelf, and only in a couple of sizes/flavours.
Seems that metal 'Amendment 3' boards are rarer than rocking horse pooh at the moment, so OP, you should speak to your electrician to see what he can obtain or wait a while till the shelves get stocked up and the guys here, can give their views, once they fitted a few. IMO the Hager one seems to of had some thought put into the design, the rest seem to have put the contents of their plastic CU's into a metal box.