I agree, and the one that I posted was on the high end, I think.
The problem is that it is not a standard cable, or at least one that is very limited in availability, outside of the device the included it when new.
Unfortunately, yours is lost, or misplaced by a former owner.
As you may know, the only way to get USB on that Wallstreet is using that, or another similar PCMCIA card.
The card, without the cable (which is what you have now), is useless.
It's one of the problems that can appear when you have a unit that uses a non-standard dongle connector.
And, now you know it is quite hard to find, unless you want to get a full set with a replacement card.
I did search for the card, and found a variety of links, many on eBay.
A couple of cheap buys stated "no cable, just card", which doesn't help you either
That was the "help" that I offered, perhaps spending a lot of money just to get a cable.
If you find a cable, you will likely need incredible luck to find someone with a long experience in laptops, with a dongle in a junk box somewhere.