MicroVax II diagnostic tape?

Well, I've been playing with some machines I haven't had time for before (not that I really have time now, but that's beside the point), and I was able to fire up the MicroVax II's. I have two of them, one in an official DEC enclosure, and one in a third party cabinet. They both "work" after a little cajoling, but neither boots from disk. The third party cabinet Vax has a screeching ESDI disk (sounds like a head crash) on an Emulex controller, and the DEC cabinet Vax has an RD53 on an RQDX3, and it sounds as if the rubber bumper has glued the heads to the stops. I have other ESDI disks, and one other Micropolis drive (non DEC)- I want to attempt to format and test some of them on the Vaxen. I plan on attempting to repair the RD53, but I'd like to be able to format and test disks, since I need to scare up a replacement for the other Vax. I have heard tales of a magical diagnostic tape that exists for these machines. Both Vaxen have TK50's, and I have one TK50 cartridge (jammed in one of the TK50's... Gotta free that tonight). I also have, IIRC, a SCSI TK50 (gotta dig that out tonight as well). So, is there any way of creating a diagnostic tape for these MicroVax II's? Is there an archive somewhere out on the 'net of tape dumps? Thanks! -Ian