The DB37 work by number of pins, but the only external floppies I've ever seen
 from IBM for the PS/2 line were the 4869's which
had a cable built into them. 
Too bad you don't have a digital camera or video
capture unit to diplay them
with.
Mike Ford wrote:
  I just put these on a newsgroup, and realized somebody
here might need
 them. I found 3 new old stock IBM 23F2716 cables in a box I bought. I think
 they are for a model 70 external floppy drive, looks like a HDI30 to DB37F,
 but thats just guessing. $5 each and shipping.