Not sure if you wanna add this to the OP, but from what I have read here, a work-around for the currently out-of-stock MTF-LT-5 tranny fluid is Porsche p/n 00004320729 (1 liter). Apparently it is the same fluid (Pentosin FFL-3).
See the 2 documents below:
http://www01apps.zf.com/kst464/ZF_In...011_en0700.pdf (1M tranny is GS6-45BZ or S6-4 for short)
http://pentosin.net/pressreleases/CR...Pento_FFL3.pdf