Can anyone find the frer tests in the UK?

An

I’m stumped. I’ve been to all the usual shops for a frer and no where seems to stock them anymore. I’ve tried Superdrug, Boots, Savers, supermarkets even Home Bargains and B&M on the off chance and can’t find them. I really wanted to test with one to confirm because they are the most sensitive on the market.

Anyone got any ideas where I can get them from?