For a keyboard that old, maybe it’s worth looking for secondhand non-usable ones being virtually given away, and you can cannibalize them for parts…

Just FYI, but the Roland G 70 used to have two lower parts AND manual base part, if you are looking for something that sounds great and may still be within its usable window.

I used to have two (I always try to keep a spare Just in case…!) And I still have one left. It still does some tricks that my newer BK9 cannot do. And the basic GrandX piano has yet to be equalled by any arranger I have played! I can’t tell you how many sessions I did using that piano instead of the studio’s baby Steinway! Keep your eye open for one, they are heavy for live use but worth it! I gigged mine for well over 10 years. Bombproof…