That's Bill N's website, he hasn't updated it for quite some time due to other things in life taking up his time.
There are a few missing C.A.V.U. 45s from his list. The Midnight Rock 45 is perhaps the onlky one that sounds like it was not recorded from a land-line telephone connection!
Have to check my notes but the band didn't "do anything else" record-wise after the 45 came out.