Kerr & King in the UK have some nice desert 15mm buildings that are usable for AQ. All the removable roofs I received were warped but it was easy to make new ones with from styrene. Crescent Root is back in business with textured mdf buildings versus their old cast products and have a good looking 15mm desert line, including a variety of fortifications.
I was fortunate to pickup all of the MBD 15mm desert buildings. With those and the 'Administration' building (read two very large ruins) and the Sawmill, Southern Plantation, and other timbered buildings, I've got a very nice selection of my so called 'hardware' stuff. With all the Paper Terrain for my 'software' terrain, I'm pretty well set for all things AQ