The version of Por Una Cabeza in True Lies is the same version found on the "The Tango Project" CD by the 3-musician ensemble (William Schimmel-accordian, Michael Sahl-piano, and Stan Curtis-violin) known as "The Tango Project," which they released on the Nonesuch label (originally in 1982). A 1991 reissue of this CD is available new on Amazon. I have the 82 release; it's excellent.
Also on Nonesuch (original release 1983) is the "Two for Tango: The Tango Project II" CD by the same 3-musician ensemble but supplemented with a second violin as well as a bass player. Amazon lists what appears to be an out of print 1990 reissue with used copies available. I have the 83 release; it's very good but maybe not quite as good as their first CD in 82.
The reason for all the detail above is just to be as clear as possible about exactly what CDs I am talking about. Thats because there are several other CDs on Amazon which also sport the name "Tango Project," but they are on other labels and with different musicians. I know nothing about those.
In addition to the two CDs by Schimmel/Sahl/Curtis recommended above, I have two other tango CDs which I can also recommend: Soul of the Tango, The Music of Astor Piazzolla by Yo-Yo Ma and Super Triango by Peter Breiner & His Triango Trio. The Breiner CD (very pricey on the FIM label) has a similar tango dance feel as the two The Tango Project CDs described above whereas the Yo-Yo Ma CD has a classical music feel to it.