GP5 Hybrid (JDM import) – intermittent A/C fade, suspect receiver-drier

[BongoBaggins]

Hi all, hoping someone's been down this road before.
2014 Fit Hybrid GP5, JDM import. A/C cools fine, then fades to barely-below-ambient after a while running - recovers if left standing, then fades again. Blower/airflow doesn't change, just the air itself goes warm. Already had a regas (270g recovered, refilled to 430g spec).
My money's on a restriction or moisture in the system rather than the compressor itself - pointing at the receiver-drier. Genuine part number (from PartSouq, for this GP5) is 80351-T5A-003, superseding 80351-TR0-A01.
A few questions:
Has anyone replaced the drier/condenser on a GP5 hybrid in the UK? Who did it, and where'd you source the part?
Any known aftermarket cross-refs that actually turned up and fit (UAC, Four Seasons, GPD etc. all list equivalents on paper, but wary of ordering blind on a JDM car)?
Since it's never been a UK-market car, is there anything drier/condenser-wise that differs from the equivalent Civic/Accord-family part it shares the number with?
Any pointers appreciated - trying to save the garage some digging before it goes in.

[TnTkr]

I would start investigating what makes the compressor to switch off, and specifically observe if it the overpressure switch activates. Or if there is some temperature switch in the system.

[BongoBaggins]

I've actually already got some data on this from HDS logging. During the fault, the A/C switch signal on the diagnostic tool stayed ON the whole time - and that signal only shows ON if the pressure switch is happy (not tripped high or low). High-side pressure barely changed either, so an overpressure cutout doesn't look likely from what I've captured.

[Marco1979]

Could it be that it is running a bit too cold causing it to ice up? Does setting a higher air speed and less cold temperature help to keep it running for longer?

[BongoBaggins]

Could it be that it is running a bit too cold causing it to ice up? Does setting a higher air speed and less cold temperature help to keep it running for longer?

I've not actually tested that but that kind of sounds like it's defeating the purpose of the ac. On any journey, it generally works fairly well, until it doesn't. A pretty immediate stop in cold air. Vent flow inside the car continues the same.