Lexicon RT-10 laser units

Greetings. I have a Lexicon RT-10 universal disc player with it's laser needing to be replaced. Cannot find a laser for it.

Questions :

1) Is there an alternate laser I can install? If so what do you suggest?

2) Would a Lexicon RT-20 Laser fit and be suitable for the RT-10?

Appreciate your advice please.

HGF