Uh, what? 1.1x crop for 4k120p is hardly a compromise in a camera that costs $3500 USD and is as good as this one is for that money. You're still getting pixel-for-pixel UHD 4K, the crop refers to 10% crop into the full frame sensor size, not a crop into the original picture's resolution.The resulting image is still without pixel binning or noticeable loss in quality, just a 1.1x crop on your focal length. Compare this to any of the competition who for more money cannot even do 4k at 60fps without a full 1.5x APS-C crop (S1H) or the EOS R5 which cannot do it for more than a few minutes without overheating and needing 20-30 minutes powered down to do it again.
As for the OP's question, there are no recorders that can achieve the recording of 4K @ 120fps externally via HDMI, unfortunately. It's a limitation of HDMI 2.0 which all currently shipping monitor recorders are equipped with. The camera itself now has HDMI 2.1, but will remain to be seen whether that actually does make it possible or not. I doubt it for a product this early in the HDMI 2.1 ecosystem.
The best you can do is use an Atomos Shogun Inferno, Shogun 7, or Ninja V to get yourself 4K 4:2:2 up to 60fps in ProRes, and then record internally to V90 SD or CFExpress A for the times that you need 120fps at 4K. You can still monitor the 120fps of course on your Atomos, but the camera will need to record the 120fps. Note you don't even really need the CFExpress cards to do the job. A V90 SD card will get you every recording mode and framerate except S&Q mode, which is the recording mode where the camera will record an already-slowed-down version of the clip with no audio. I don't see the need for this personally when you can still record 4K 4:2:2 120fps to a cheaper v90 SD, with sound and slow it down in post. You could feasibly do all internal recording and use a cheaper non-recording monitor like the Atomos shinobi or something, but IMO having the ProRes and cheaper PC SSDs for media is so valuable even if it does not go all the way to 120p.
And finally, if you're looking for ProRes RAW, note that the only currently released recorder that can do it is the Ninja V. Huge disappointment for me as the owner of two 7" Shogun Infernos to see that there isn't a 7-inch RAW recording solution out there, as I don't like the 5" size. Not even the new Shogun 7 will be doing it, as confirmed to me by Atomos who claim only the Ninja V has the hardware to take in RAW via HDMI. I've been recording ProRes RAW for quite awhile from other cameras via SDI on my monitors, but HDMI I guess is a different story. I'm gonna hold out and keep on using ProRes 422/422HQ/4444 on my Shogun Inferno until they hopefully and eventually do release a RAW-recording 7" monitor.