You might wanna check here:
http://www.ow.no/archive/eba/1198.PDF
I already did 2 A/C retrofits w this guide, but w parts from a donor car. While your list seems to cover the larger bits and pieces, I agree w the former post. Lots of screws, small brackets and stuff like that are needed too. And the wiring harness is missing too, you def need that. It includes several connections like the one for the electric fan for example, which your car not features.
Considered the price of the A/C solutions kit, the HVAC unit and other parts and the work on top, I would maybe rather consider buying an E30 with A/C. If not- feel free to ask, maybe we can assist further w the retrofit.