The 945 looks more like a Beretta than a 1911.
Doing a cross reference on Galco's website, it lists the Scout IWB for the Taurus PT945 as having a model number of SCT248, that number matches to the Scout IWB for the Browning BDA 45, and the Sig 220 w/ no rail.
The BDA 45 is the early version of the Sig 220
Might want to try a Sig holster.