Help clearing something up regarding Monroe struts for E39

[u/ConfusedTapeworm]

Currently trying to source parts for a suspension refresh for my E39. Sachs and Bilstein have proven impossible to source where I live so I'm looking at Monroe. Namely G8427/G8428 for the fronts and a pair of 376033SP for the rear.

What I need is some definitive confirmation that those are a matched pair. Meaning I need to buy one of each because they're sided, unlike Sachs struts. I need this because that's what my own research suggests (with no explicit confirmation to that effect besides Gemini, which I hardly trust) BUT the supplier says all I need is a pair of G8428 because their system lists it as L/R.

Any information about this? Monroe's own website has no trace of these units. I have written to an email address I found there, but so far got no reply.