Just release it without a license and call it something else then, OB-V
As long as we all know what is trying to emulate I don't care if they have the Oberheim logo or not. I don't get companies like that. If they don't want to recreate their own old products just let others do it and collect the license fees then. Roland is another one with lots of legacy products that people want (Jupiters, Junos, SHs, XOXs, etc.) but they are not doing anything about it. They're good at going after people who tries though...