Keith,
I have this instructional DVD on a large range of mold making methods.
I will review it tomorrow night & arrange to send you a copy, if it proves to have useful information.
Often these things can be made 'in-house' with the right knowledge & materials.
If the copyright holder sees this post.......I am kidding about everything I just said. I would never do that!Anyhow, i'll get back to you tomorrow nocte with the verdict. It may be a handy FYI thing to have anyway.
T.