Same situation for me...
MAX100, from what I can gather, is on many gun forums and makes custom parts (shotgun tube extensions in my case). One was ordered and paid for in early may. He was prompt to respond and take my order via email (I found his name through a google search and he comes up on several forums including this one). I was quoted about 3 weeks for it...great....well....it's now been almost 4 months and I have not received the part and can not get any kind of reply from him through email. Reading some other forums, I am not the only one in this boat right now. I did email him after the initial 3 weeks and was pretty much told that he was busy and didn't really have time to respond to emails (tho he had no problems responding when taking the order).
So this message is to first see if anyone knows him personally that can get some kind of reply from him on what is going on. Secondly, this is to warn any potential buyers that may be sending him money right now.