Agree! And any spa can have an issue, I don't care what brand or how much you paid for it. The check valve failed because it failed, clamp or no clamp. As far as the circ pump it's also the reason they went to a high flow type circ pump. They should have gotten rid of the Laing's a long time ago, always been a pain in my side!
Anyway back to things in hand, as long as it's 220v with the same size fitting for a 3/4" hose it should work, Grundfos comes to mind. But I would really go to the dealer and get them to fix it, or worse case give you the pump to do it yourself! You can bring the bad one back and they can send it in for warranty. they might not do it and tell you it will void your warranty which to me is BS but who knows with them? Where do you live?