Is anyone familar with HP-IB disk drives made by IEM?

I went by a surplus store today and found two interesting disk drives made by IEM of Ft. Collins, Co. The first drive is a Series 5300 (model 5365) and appears to be an MO drive. It has a HP-IB interface. The second drive is a series 6000 (model 6050). It has four drive indicator lights on the front so it may have four fixed drives in it. There's also an LCD display on the front and three buttons labeled "Prev", "Select", "Next". It appears to have both a HP-IB interface and a SCSI interface! Does anyone know anything about these drives or what media the first one uses or what the dip switchs on them do? I searched the net for IEM and found plenty of references to them but the link to their site is dead. The links referred to them as a thrid party supplier of HP drives but didn't give any details. Joe