Harold: How did you remove and reattach the little fish?
Did you try to order just four tiles from DriDek online or by phone? It's been more than a year since I last ordered from them, but I ordered online and I think I remember some sort or "minimum order warning" popping up, which I ignored and the order went through.
As for removing the little fish, the answer is VERY CAREFULLY. As soon as our new trailer was delivered, we knew we did not want those fish on the floor, but were hesitant to throw them away. So, I very carefully peeled them up, tearing only one. Since they were fairly new they had enough adhesive left on them to stick to the wall. The artists in my family told me there should be an uneven number, so I called Casita to see if I could order more. I was told they had discontinued using fish and none were available. The four remained on the wall until the decor scheme was changed and now the fish have gone to the fish tank in the sky.