I'm in a hobby basement band we use a drum machine, Dr. Boss. We play Rock music. We program the drums to sound as close as possible to whatever song we are playing which is very tedious. Does anyone know if there is a sharing library of drums that we can borrow. We could share ours too, ours are on floppy discs. Know where we could purchase drum tracks for our machine?
Well, I can't advice a concrete library for a specific hardware you're specified there, but I can advice you next thing:
There's a lot of sites on the internet which have tabulatures in Guitar Pro or power tab format. If you can a bring a PC to your rehearsal place, and connect it to a speakers, your problem would be solved.
For example, you can look at the site http://ultimate-guitar.com, which have tabs in guitar pro format for almost every widely (and not really widely) known songs. Those tabulatures often (in 90 of cases) contain a drum track. You can buy needed software, open that tab, select to play only a drum track, turn on the RSE (realistic sound engine), and probably you'll receive a quite good drum backing track.
Or, also, you can export that drum track in midi format to FL studio or some other sequencer and run it with plugin like EZDrummer (for example) or some other wave table plugin which have real drum sounds. So that option also would give you a quite well drummer sound too.