It's got nothing to do with Denon. D&M own DNNA who own Rio who own the IP. D&M also own Denon but they're going to be very confused by this.

The person who can raise this officially for you is me. I said I didn't want to raise it officially, and suggested you may not really need to do so. Since you clearly do want to do so I'd suggest you're out of luck as our company changed hands today and nobody is going to want to spend time thinking about a long discontinued product right now.

Rob