Finding them isn't the hard part.... Guardian, Mason, Otto, etc. The hard part is affording it! Last time I price checked a real grip, it was about $15,000 USD (And that was without the guts!!!)
I just got a quote from them for an LOH grip and that was roundabout $2000 including the switches. Still expensive but just yet within my budget for a "real" part. Asking doesn't cost anything .
It's taking slightly longer to sort out than planned, but we will soon be able to offer custom grips of your choice. As long as we have accurate enough drawings or pictures we are hoping to be able to create any grip. And the cost will be a lot cheaper that $2000!!