Sometimes they come up on Ebay (at a price). I daresay Tyneside aquatics or Kesgrave Aquatics have them or can get them and will ship too (at a bigger price, though they are quite reasonable IMO).. OR have you tried to find out if there is a local cichlid society/club ? Doubtless members there will be able to help out. Good luck and lets see the tank when its set up