I found the old armor plate sides on Bambu's website and below was a STEP file of the P1P/P1S frame. I opened it up and there was even a weird opened up version of a housing. I noticed that those links have been up a while, but I can't find much like this on MakerWorld, so I modified it and got it to be similar to a full enclosure (without the glass top and door). Works for my needs since I print a lot of TPU and just need some better insulation and ambient air resistance.