I do not recognize that tag.
Caterpillar Reman does all of the V8 Diesels designed by International/Navistar for both Ford and Navistar applications. Their serial numbers are 6 digits, but I have never seen one higher than 5XXXXX.
AER is the Ford OE reman supplier for the vast majority of Ford's gas engines and the 6.7 Diesel. It may be an AER tag, but they typically have the Ford logo stamped in them.
I have never seen a Jasper label without the "Jasper" name on it. Same with SRC, and as far as I know, SRC has never remanufactured the IDI's. (I can't find any work instructions in the archive for an IH IDI, anyways.)
Reviva does a wide variety of diesel engines, and it may be one of their engines, although their tags are typically maroon.
And it may have been done by some defunct company that is no longer in business.