I would have agreed with Shoota not so long ago but I just fancy one now. I have tried Sainsbury's, Tesco, Iceland and M&S. Many other types, mostly strawberry. but no blackcurrant. M&S have a cheesecake in their Christmas range which is supposed to have blackcurrants, but I bought it today and it is tasteless. I would agree with Douglas9401 if I was clever enough to understand him!!
Waitrose do an frozen essentials blackcurrant cheescake. www.waitrose.com/ecom/products/essential-waitrose-frozen-blackcurrant-cream-cheesecake/622162-88253-88254