As an alternate, any idea if the screens are interchangeable? I gather there is a minute character difference, but any thoughts on how well a straight swap might work?

Clearing out old studio storage, came across a Roland R-8 and R-8mkII with supplies and a mk1 manual.... Great news, right, well, but... Unfortunately, the mkII has a cracked screen -- it powers up and I can poke around a little from faint memory, but it's about 75% illegible. Anyone have any pointe...