Searching one TK50

Hello. I have a lot of TK50 tapes just received. They appear to contain VMS 5.0, 5.1, 5.2, 5.3 and 5.4 basic distribution, plus the mandatory updates. There is some copies of VMS Fortran, VMS C 3.0, and Oracle for VMS. And the backups contains references to Word Perfect documents, then I suppose the Disk Backup Images (there is some of them) could contains a complete system installed. The question is that I don't have actually one TK5o to read them. I have one Microvax 3100 and one MIcrovax 2000, and I'd like to purchase or obtain one tape unit for every of this machines. If I understand it ok, the VS2000 needs one model, and the other DEC (or Scsi) machines the other TK50 model. Well.... What's about this ? There is somebody that knows about some tape device (or both) for trade ?