Hello,
I'm a member of the 501st and other than the Anovos site, there are a lot of armor makers out there. But the price tag is usually over $500 (and that's just for the parts) If you do choose to order from an armor maker there is usually a long wait time (an affordable armor maker called ATA has an over 6 month wait)
Transmute Jun has a great suggestion of getting a helmet only. If that's the case, you can get an Anovos one no problem. =)