which minidisc models can offload to a PC

I am confused.
I am trying to source minidisc players for some of the other volunteer
reporters at my community radio station to do field reporting (it's a
pain to have to go to the station to get the one decent recorder). But
they have to be able to offload their sound files to a PC for editing.

The one I bought for myself (an MH-RZ910) is perfect -- it takes a USB
cable that plugs into the side of the unit and presto! you offload via
Sonicstage.

So I assumed they were all so equipped. but the next one I bought (on
ebay) didn't take that computer connection cable. so it seemed useless
for making radio.

As I consider various offerings, how can I know which models connect
to a PC and which don't??

Many thanks