*early* Domain OS available?

Quick check - does anyone have an earlier floppy-based release of Domain OS for Apollo machines archived? We've been offered an Apollo, but no idea yet of which model - all the details say is that it dates from when Apollo were independent (which possibly still means it's something like a 3000, I suspect - weren't HP not really involved until the 400 series?) Anyway, the machine has no OS, but it does have install floppies (that's another thing; I thought Domain OS came on tape by the 3xxx machines - floppies suggest it's much older). I'm willing to bet that the floppies aren't in the best of health by now though, so figured I'd check if someone has floppy-based install media archived anywhere before I chase this one up! (last thing we want is yet another machine with no software to run on it :-) cheers Jules