For the record, here's my Jeff Tanner experience so far:
"Inquire" per form (turns out to be an "order") as the next thing I got was a PayPal request to be paid with 10 GBP added for shipping.
Current price is 20 GBP (any size under .600 (he makes up to 2")) plus the 10, which converts to just under 53 USD this week.
I consider that quite reasonable considering that i could have just as easily for the same money ordered a .527 or .533.
If i like this one, I'll order two or three next time to save on skipping them over the pond.
but these are "block" moulds not bag moulds---maybe "BP shooting" is better category?