@musichead,
Congrations! I believe that a strong case could be made for either CD PRO drive mechanism. In my post above I provided a link that has information on the Phillips CD PRO unit utilized in your Rega player. No doubt there’s compatibility with your Rega amplifier.
The Phillips engineers who developed these previous generation drive units are now a company called Stream Unlimited. I believe that their latest technology unit(CD PRO-8 with new Blue Tiger servo card) found in the Pro-Ject CD BOX RS2 transport would have also served you quite well. Either way I believe that you’d be happy. 😊 Enjoy!
Charles