We spoke to some of the local suppliers, and for a basic murphy bed and cabinet with no additional storage space the price would have been about $3,500. That's a little steep, but the bigger problem is that we didn't like the style of any of them.
I'd seen two ikea hacks that used Pax cabinets with a murphy bed kit:
Neither of those were what we were looking for either, but they inspired me to try something similar with some tweaks.
Step 1: Two Pax Wardrobes
If I were doing it again, I would probably increase the spacing to 180cm, just to get a few more inches clearance.