A clunkier but possibly cheaper way you could achieve this is with a genlockable scan converter and some Cadet Video Inputs.
For full color NTSC composite input, you’d need 3x Cadet IIIs (or 4 if you want Luma in too), an Extron VSC700, a VGA to RGBHV adapter, a composite to VGA converter, and a handful of BNC to composite adapters.
Full color NTSC composite -> composite to VGA converter
VGA signal -> VGA to RGBHV adapter
RGBHV adapter -> Extron VSC700 BNC inputs
Extron R/R-Y, G/Y, and B/B-Y outs -> 3x Cadet IIIs composite inputs for patchable RGB
Extron Vid Out -> 1x Cadet III for patchable B&W Luma
Memory Palace acts as primary sync by sending its composite Video 1 or 2 out to the Genlock In BNC on the Extron VSC700 otherwise you’ll be scrolling. 
I can’t remember the exact settings I put my VSC700 on but I recall fiddling with it to get colors looking right since it can output a couple different formats. You’ll need to get your Cadet IIIs’ brightness/contrast set pretty precisely too to accurately represent the original color mix but it’s more interesting to have control over it.
TBC2 is clearly more elegant but this has worked for me.