Slightly off-topic regarding any new Electromatic amps in prospect.
Tonight, I had a practice session in the house with my youngest son playing his Black Electromatic Pro-Jet with Bigsby through an old Evans Echophet box which I had set to give a single slap-back echo. I sang into a mic also going through this echo, again with the same slap-back effect. So both the guitar and vocals were going into the little Electromatic G5222 valve amp. I was playing slap-bass using my plain gut-strung upright bass, unamplified. We had a fantastic authentic 50's Rockabilly sound, and the little G5222 handled it brilliantly.
What a great little amp the G5222 is.
I spoke to another Gretsch player this week and she agreed that if they brought out a valve Electromatic tweed amp of say 15-25w it would be a sure-fire winner.