Annie, if the type of drawplate you’re looking for is the type that
Mary mentions, then a similar type of drawplate is normally in stock
at Frei and Borel.
The picture from Cooksons looks slightly narrower than the one
available at F&B, but you should check it out to see if it’s
acceptable. F&B also has a triangular drawplate with swelled sides
that is narrower, but it doesn’t have straight sides
I have the entire series of the high triangle shape. They are Italian
made. I’ve used them a lot and really love them. If for some reason
Frei and Borel doesn’t have them in stock, you may also be able to
get them at Progress tool (progresstool.com). As I mentioned
before, you can custom order other shapes from F&B. They do have
narrow triangular shaped plates listed.