Found two of my references.
"Extra 2200 South" issue 79 (cover date April-June 1983; published October 1983) has color photos of four E60 locomotives, in two body styles. The Amtrak E60 had large, trapezoidal, windshields (only a narrow strip between the right and left windshields) and number boards below the windows. The later Mexican (& DWR) units had smaller rectangular windshields, and the number boards mounted above them. ... The four units shown are:
(1) NdeM EA001 (first of 39 units for Mexico, built in 8/1982 but delivery delayed for financial reasons-- "E2200S" sais that delivery of the 39 was to finish in early 1984)
(2) Deseret Western WFU2 (one of two units built for this Colorado mine operation in 8/1982: GE serial # 43145,43147 -- I don't see any differences between them and the Mexican unit)
(3) Navajo Mine LDE20, one of two ex-Amtrak units (966 and 968) purchased for this New Mexico mining operation in 10/1982
(4) New Jersey Transit 967, one of ten Amtrak (958-963, 967, 971-973) units leased by NJT in 9/1983.
"Railfan and Railroad" for September 2003 (20 years later! I m getting old!) has an article on the Deseret Western. At that stage, in addition to its original pair of E60, the DWR had purchased EA031 (in use) and EA035 (for parts). The article ends with a box on the history of the Mexican fleet: EA005-EA008, EA024 and EA025 had been retired in 1994/1995 after wrecks and the rest stored when post-privatization TFM shut down the electrification. TFM traded most of them in to GE for new AC44 diesels, and in 1999 the Black Mesa & Lake Powell bought EA004, 022, 023, 032, 034, 036, 038 and 039 to supplement their original six freight E60: there's a photo, dated May 2003, showing two of them trailing two of the original BM&LP units on a train.
I don't think I have seen anything in print with more recent information.