It would have to be fakeable to more than just me. I expect at least two other independent witnesses on hand.
You're not an independent witness. You're the accuser. Name the other two witnesses, or describe how they would be chosen to your satisfaction.
I also expect to be allowed to hook up our own pirani and hot cathode ionization gauges.
Why should the people you accuse of fraud based no evidence except your ignorant doubt allow you to tamper with their equipment in this all-important test? Contrary to what you might expect, you have a burden to show at least a modicum of
prima facie evidence before you can make demands upon other parties.
And you have answered the pressing question. Hamilton Standard sold porous plate sublimators commercially for decades. Their successor Hamilton Sundstrand, with whom you claim to have had dealings, continued to sell them until they were acquired by UTC. In all that time, why didn't you purchase one of their sublimator products and test it yourself in your own way, or via an independent testing laboratory? Armed with those findings you could have taken H-S to court for fraud. That is, if you really believe your claims have merit and you're not just grubbing for attention.
I'm confident that my level of experience with vacuum systems is sufficient. ... But maybe they have some huge vacuum pumps to compensate for the sublimator sublimating.
If you have to speculate about how test chambers compensate for outgassing of the test subject then no, your level of experience with vacuum systems is not only insufficient but almost entirely ignorant.