I have a friend who is a breeder/Importer who was selling 2.5" Discus for £10, not sure if he posts but I'm sure he does, will look into it for you if you are interested, he uses this forum his name is 'Seanie'
I saw some of his adults in person and they were very nice, however I'm not a pro with Discus strains, I have only ever kept Blue Turquoise's in the past (I kept 3 about 5 years ago)