Any suggestions?

A bit of a departure here--this post is not about gun rights, although it is about guns. Back in April, I wrote about my plan to have an AR type pistol built, chambered for the .50 Beowulf. Don't ask me why--I can't really think of a practical use for it. I guess I just liked the idea of upsetting the bed-wetters on three fronts--it would be a handgun (sort of), it would be an "assault pistol," and it would be .50 caliber (I figure that most of the people I'm trying to upset wouldn't be aware that the .50 Beowulf has nowhere near the power of the .50 BMG that so terrifies them).

At the time, there actually was a company (Bohica Tool) that offered an AR pistol upper reciever in .50 Beowulf.

A completed gun would look like this:

I could not find a phone number for them, but I emailed them more than once. I didn't particularly worry about the lack of a response, because I had heard that they could be hard to get in touch with.

Well, by last week (I had kind of put the whole project on the back burner in the meantime), I figured that my original emails would have been answered by then, if they were going to be answered at all, so I looked again for contact information, only to find out that their website (and presumably the company) no longer exists.

So much for that idea. Actually, I had heard that someone at Olympic Arms had built a .50 Beowulf pistol based on Olympic's OA series pistols (which incorporate the buffer tube into the upper receiver, so it doesn't stick out the back, therefore saving the extra length of the buffer tube)--Oly Arms' "regular" OA series pistols (.223, instead of .50 Beowulf) look like this:

I (briefly) thought I had found the insane blaster of my dreams, until I came to understand that it's not particularly likely to ever hit the market.

So, does anyone have any ideas about how I can make this project, in some form or another, come about? I'm not quite married to the .50 Beowulf caliber--.458 SOCOM, .450 Bushmaster, .475 Tremor, and .499 Leitner-Weis (and probably others) would also be possibilities (although I'm still leaning to the Beowulf).

I have no mechanical skills, and can't drop a gazillion dollars on something for which I still haven't come up with a practical use, so I realize this request will be tough to grant, but if anyone has a suggestion, lay it on me.