I have today listed on eBay an electric spoolbox assembly. It is in 
a piano set up to play G rolls, but I believe that the spoolbox is 
one made and sold by the Player Piano Company years ago. I think 
I once saw it in an old catalog, but I cannot find it now. You can 
find it on eBay by searching for "player piano electric spoolbox".

 [ https://www.ebay.com/itm/175699674297 ]

I have it listed as pickup only so that the buyer can remove it and 
all parts that the buyer wants. However, I could remove the spoolbox
and ship it if that is the only way to sell it.

For local pickup the buyer could take the whole piano if wanted, 
though the player action is very weak and needs a rebuild.

Let me know if you have questions or if you can provide any more 
information on this unit.

Gary Goldsmith 
Big Lake, Minnesota 
tel.: 1-612-810-3017

 [ It features a sturdy chain drive to the take-up spool. -- Robbie