Ben,
You can try http://www.audioadvisor.com for a wide variety of popular stands at good prices.
My personal favorites are stands from Lovan, http://www.lovaninc.com
You definitely do not have to buy stands from the same company as your speakers.
James, I succesfully and easily wall mounted my complete Ascend Acoustic 5.1 system (except subwoofer of course). The speakers have integral inserts and Ascend has specific wall mount brackets for each speaker they sell. The system sounds wonderful and the manufacturer direct business...