Cousins reviewed my situation, verified that their data table did show that this part was interchangeable between the AS1240 and AS1193. They were therefore kind enough to issue a refund. I feel for them, as I know how difficult is must be to keep such things 100% accurate. And again, mine may be an export variant that was used in the US and not the UK. Case closed. All's well that ends well.
All in all, this was a good experience. Thanks, Cousins, UK. Cheers.