you havn't said in either thread what car it is you want this st2 map on mate....
As per the above, Badger 5 or R-tech are the only two sensible options for the thinking man, but it depends on what you want exactly and whether you have a map of any sort on it currently. Badger5 and R-tech both do ME7 and ME7.5 (APY AUM AUQ AMK BAM), although currently I believe only R-tech can map ME3.8 (AGU - A3)
If you already had a revo map on an S3 for example, then JKM could do a revo st2 for about £50, although that's still just a generic code, many people have made good figures from it, although it'll never be as good as a true custom tune from R-tech or B5, and if you don't already have revo st1 then Revo st2 will cost you just as much, if not more!