Help!! Looking for the Aptasia eating Nudibranchs

Have been battling these stinking things for too long and seems that there's always one that remains and manages to multiple before I find it. Wanting to know if anyone has any of these to loan or if there are others wanting to get some and rotate them. Hate to have them die once they've done their job, so if they could be the traveling nudibranchs, that'd be great.

 

I put a long nose butterfly in one of the tanks that I maintain and was fortunate to get one that eats them....had one in there that didn't. They still live in the overflows and plumbing, so need to get those cleaned out. The tanks that I need to get rid of them in now, are too small for a Butterfly.

I have coral on the rocks, too, so have to be careful about how I try to get rid of them.....try to stay on them with injecting boiling water, but even one gets left and the bugger will reproduce before I can blink!