Sorry. I just looked and found I called SPRING.LSP. Anyway, my comments say that it is licensed solely to William J. "Bill" Townsend, Jr. If he is still around maybe you can get his permission to get a copy. It has a DCL file too, so I would want to repackage it as a VLX and remove the security.
The COIL.LSP program I wrote to design a solar water heater out of 1" poly pipe. It's a 2D flat coil meant to be attached to a piece of plywood. I did find that a 100' coil (with 1/4" spacing) would fit on a 4'x4' sheet of plywood. I bought the pipe but never built it. It was for heating my swimming pool, but even in NJ it gets plenty warm enough by the end of June without the heater. By August we are looking to cool the pool. When we rebuilt the pool in 2006 I should have had the contractor bury a coil of pipe more than 4' in the ground to cool water pumped through it. I am NOT buying any heaters or coolers that pool suppliers sell. I don't have the money and I'm too cheap anyway.