These aren't terribly difficult to troubleshoot and rebuild, so I don't know how much interest there is in a complete board replacement. I figured I would ask here first. Is this a thing that I should bring to life?
Not sure if I should proceed if I'm going to undercut someone. New old stock still seems to be available from https://www.flippers.com/catalog/product_info.php/sound-board-dragon-p-2818 but I feel I can make something with better, newer components for well under the $350 that they're asking. moto_bone had previously mentioned a year ago that this might be a work in progress, but I don't know if that's still on the radar.
It wouldn't be a plug-and-play board; jones connectors are impossible to come by new and the pins that Interflip used don't seem to be standard. Probably the best I can manage is a short harness with a disconnect on the new board and male pins that can be inserted into the appropriate places on the existing female jones connector inside the cabinet.
In any case, I figured I'd float this trial balloon. I've changed PCB design suites over the holidays and I need a project to practice with. I'd rather make something that fills a need in the community rather than just serving myself.