I'm not finding that the Champion was made on Corey, or the Enforcer or Valkyrie on Hesperus.
The Enforcer & Valkyrie both spread to Hesperus around the 4th SW IIRC, its not from a TRO but I believe its a note in the 4th SW Atlas books IIRC. (Possibly 20 year update?)
The Suns picked up Hatchetman production from the Lyrans as well as part of that whole share everything with the merger.
What's your source for the Champion being produced on Corey? Sarna mentions it, but the only source they site is RS: 3039, and that's for the BV. Record sheets don't list factory locations.
It was mentioned on Sarna.
I didn't even know Bergan had a factory on Corey but that is what Sarna was saying.
I seem to recall that in the days before the MUL, when they were fluffing which SLDF downgrades were still around & history was being rewritten & things like the Flashman got assigned to be produced on Hesperus, that house Liao had the Champion in their Faction list for 3025 where as other houses didn't.
So it might have been the revised TRO3025 that had them producing it.
History conflicts a bit, as TRO2750 has the Champion still being in production on New Earth at 2 factory sites & has an in universe date of 3049 IIRC.
Then later TRO's say that factory was destroyed in 2776 IIRC.
Yet even later sourcebooks mention that the Factories were intact & stripped of advanced production components in 2788 during Operation Silver Shield which is how the Royal Locust went away.
So the authors have contradicted themselves a bit over the years, go figure.
Now that I'm in front of my books, I can't find anything either. If you look at the TRO:3039 entry for the Highlander, you'll see the word "Corey" in a paragraph next to the picture of a Champion (used as the SL 'Mech page header image). That's the closest I see it to getting produced on Corey. I've removed the erroneous statement from the wiki page.
I'm glad you said you deleted it.
I was starting to think I was crazy since its gone now & I just read it over the weekend.