Zfields,
Have you thought about trying to accomplish this seemingly impossible charging handle job via Kickstarter? I bet that if you just wrote up a brief synopsis of what you are trying to do, include the photo of charging handle, posted a link here, on AR15.com, on shotgunner.com (or whatever shotgun pages there are) you might get 50 or 60 people wanting these things. I bet there are more than a few guys in the competitive shotgun realm using a 712 that would really like a better charging handle than the dinky POS it comes with. I don't think you would even need to do the video...but those are cool and they let your "investor" know who they are dealing with.
You find a machinist that will make a minimum of 50, find out how much he'd charge plus how much for each additional over 50, then set your Kickstarter fundraiser goal for the minimum fee the machinist wants, shipping, and the profit you want. All of us make a kickstarter donation and if you don't raise the money by a certain time, then I think everyone gets their money back and we're all back looking for bolt handles praying that maybe Nordic will make another run. If you do raise the funds, as soon as the machinist makes them, you send them to us and we can do the same thing for a barrel clamp that fits because that Nordic clamp didn't fit on mine. It squeezed the barrel and the mag tube together totally screwing up my POI. I thought I was going to permanently damage my Nordic mag tube extension.
Too bad you couldn't get an email or snail mail list of 712 purchasers. I bet 90% of 712 owners would buy one and I'll be that CZ has sold at least 500 of them.....but then that gets into gun registration and the govmint and all that crap. lol.