If we were to step back to the time when the Al-Khalid deal was first signed, I'd probably want to approach Brazil to bail out Engesa and co-produce the EE-T1 Osório MBT with 120mm GIAT G1 gun:
My reasons are:
1) Both the EE-T1 and Al-Khalid/MBT-2000 are light weight MBT's (42-46ton) and would make a fair competitive comparison.
2) The EE-T1 is likely to be equipped with more advanced technology at the time (~1990).
3) Brazil does not have the same arms export restriction as US or EU.
4) After Saudi cancelled their EE-T1 order, Engesa filed for bankruptcy and laid off 3,000 employees. If Pakistan was able to step in during this time and make a "white knight" bail-out offer, I believe Pakistan would've been in a strong position to dictate purchase terms.
5) Brazilian government would be happy at the Pakistan offer to bail out its defense industry, and produce the EE-T1 for the Brazilian Army to use. The Brazilian government may even chip in to share the cost of Engesa bail-out with Pakistan.
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Moving forward, if we're talking about today, I'd aim for better relations with Washington to get local assembly deal on M1A2's like Egypt. The Abrams MBT is battle proven and maintained 90% operational readiness through the Gulf Wars. Since we're talking about "local assembly" from kits, there are no R&D cost involved.
If Pakistan was able to obtain both the EE-T1 and the M1A2, it'd have a nice mix of light (39-42 ton EE-T1) and heavy (69.5 ton M1A2) MBT's that use the same NATO 120mm ammo, in addition to being part-owner of Engesa of Brazil.