On my last trip to Disneyland (CA) before Christmas I found that both
the Welte instrument in the penny arcade and the small instrument (not
sure of the maker) in the Country Bear waiting area have had their coin
chutes blocked and now operate on an electrical timer.  They both seem
to play very short songs, so maybe the rolls have been changed as well.
The timer operates them periodically.  I am not sure if there are any
more instruments left in Disneyland, as these were the only two I saw.

Regards,
Peter Noeth