Stu:
Would you be able to post a link to the battery/seller you used, please? Might have a look at trying the same.
Might be out of stock... and the price is higher since a couple of weeks ago but plenty of others selling the same thing.
Unless you want to Dremel out your weather station make sure you get the same size (1300mAh)
Actually DM me your address and I'll send you one