Browsing https://selfservicerepair.com/home, it seems to me they do more or less exactly that (the parts sometimes are bundled with mounting screws, the manuals assume you have professional tools, and you’ll have to call them to DRM ‘register’ your new part with the other hardware.

I can’t find the requirement to rent this set of tools on that site (disclaimer: I can’t fully emulate a sale, as the site asks for an IMEI, and I don’t have a device for which they sell parts)

So, from my browsing, renting the tools seems optional.