If it helps I have found 5 B.747-236 freighters still extant.
c/n 22304 as TF-AAB
c/n 22442 as TF-AAA
c/n23711 as TF-ATX (as nominated above)
All 3 are apparently active, plus 2 in store
c/n 23735 as TF-ARJ
c/n 24088 as TF-ATZ
Not sure where they are stored though.
Hope it helps
Be lucky
David