Welcome aboard Dave. I see from your other post that you've been at it for some 30 years, that's awesome.
Best to post under the WANTED section to get a proper response.
I guess I could mention that I've got a matched pair of 1173s, which were the forerunner to the 1147s, in the FOR SALE section, but that would be self-serving now, wouldn't it ? They will need a bit of work but should be functional
.
Cheers! TomK