Do you mean there are none in stores in the UK?
Only one of the 3 stores I visited in Manchester actually had reptiles and they had a young ambilobe female. Another store owner told us many pet stores in the UK don't stock reptiles because a lot of people buy directly from breeders.
I think you could add benefit to the market by breeding Panthers if you are strengthening bloodlines and not doing any inbreeding. Do a search of the UK breeders on here, there are quite a few. I don't know if you know Chameleon World Muji and Krayzee Chamz. Between the 2 of them they have quite a number of panther locales.
If you are able to get your hands on Europe CB animals then I'd definitely breed them for adding to the UK gene pool.