Replace/Upgrade Oracle Alexandria tonearm?

I have a Oracle Alexandria turntable with the stock 'Prelude' tonearm. Unfortunately the cueing mechanism bit the dust and basically now works like a manual arm. My local service guy (which is otherwise very accomplished and knowledgable about this turntable) says it's unlikely it can be repaired (unless one is a "swiss watchmaker"). Otherwise I dearly love this turntable. It'd dead quiet and cosmetically perfect.

Oracle isn't any help (doesn't answer emails) so I'm wondering if I should attempt replacing the tonearm.

Has anyone successfully replaced the stock arm with something different and if so, any suggestions what arm I should use? Is it even possible?