As much as I enjoyed that, I don't know very many of the Christian bands from then. There have been newer bands that play prog (Ajalon, Neal Morse, etc) and some may have a classic sound. You may also follow what Karry Livgren did. I think the closest and most well known may be Glass Harp and Phil Keaggy. There had been a Christian Prog Yahoo group but nothing has been posted since it moved to Google in Nov since Yahoo shut down. I'd also recommend listening to Tri-Rock Radio as they play a bunch of stuff I've never heard of from way back when so you can expand your horizons at the same time (note they also play clean secular).
Let me know what you find. I had all the Yes, Rush & PF LPs, most of Genesis, and a bunch of stuff you've likely never heard of and I can't even remember.
"If you are not concerned about your neighbor's salvation,
you should be concerned about your own."