I'm not sure how you plan on taking apart the dashboard for less than $50 of labor, though.
Edit: I mean, hindsight is great when you're designing a new car, and Tesla did make it much easier to replace this card in newer models, but we're talking about old cars. 75 minutes of labor for an S, 90 for an X.
Of course I'm not saying that. Please re-read my post if necessary.
Edit: This is a design deficiency, is what I'm saying.
I have an Thinkpad T430s, that came with mPCIe 3G modem; for LTE, it was possible to find a replacement, but for 5G, I don't expect there will be any (any whitelists in firmware aside).
Or similarly, I have an openwrt router with mPCIe 802.11-ac wifi (Turris Omnia). It is not possible to replace them with -ax adapters, they all have m.2 interface.
With cars and other long-used goods I would expect the same problems.
Still, Tesla could have spent the software effort required to make it work with a few of the most common 3G/4G/(5G) modules from reputable manufacturers.