If you want to use the Rockola title cards (and thus be limited to the 100 selections provided by the 441), all you have to do is set up DOSCab with the same number of buttons as the original machine so there's only one page of labels. The 441 has 10 letters and 10 numbers, right? So you just need to set up a skin with UseZero=True,HighLetter=J,HighNumber=9. The button labelling would be a bit off, because I'm sure your juke goes from 1 to 10 instead of 0 to 9... I can fix that, though.
If that'll work for you, I'll set up a skin for you that'll work...
--Chris