Hmmm.. I'll answer my own question. I just ordered some washers and springs.
Here are the washers I ordered and
here are the springs. I'm sure the springs will have to be cut in half.
Right now, I took the washer off of the rsst and a spring out of an ink pen and they are working rather well on the DID, makes it super easy to capture that top wire. As far as the washerless rsst, it's working fine without it's washer. I was told by captivape that they are getting in replacement parts for the rsst in the next couple weeks... so they should have washers and springs also. The spring off of the rsst is a bit tall for the DID though.
I haven't got the ordered washers and springs yet but will post on this
thread whether or not they work. If anyone is interested..