Another option for a piano roll cabinet is an old TV cabinet, preferably
one that has a pair of doors in front.  They are deep enough and
typically large enough to hold a good sized collection of rolls.  Once
the innards have been disposed of, it is a relatively simple matter to
add shelves of suitable dimensions.

Something to think about.  I've done two over the years in this
manner.

Regards,
Terry Smythe
Winnipeg, Manitoba, Canada
http://members.shaw.ca/smythe/rebirth.htm