I think those were just limited edition. They're really hard to find. I think there was a rumour that they'll be releasing the heart coin purse in the fall in some other colors. If you want a MC coin purse, there was one on let trade. I got mine through them.
The Heart Coin purses were super limited edition, and pretty hard to get even at that since many stores (around here at least) did not receive that many, so even people near the top of waiting lists did not receive!
the UK LV site is not reliable. they leave old things on for a while and it takes ages before new things show up. like the others said you should probably call LV and see if you can find 1 and get it shipped. although i dont think thode items were as popular here as in the US. some stores in the UK still have the heart purses.