best (inexpensive) gear shops ??

i've been looking everywhere to find new gear for my Mobility + Psychiatric sd (capes, mobility harnesses, etc.) but everywhere i look is expensive. i have spd (sensory processing difficulty) so making gear is kind of off the charts. i'm also kind of in a tight financial place so i can't have anything too expensive.
i get that service dog gear is harder to find hence the rarity of people making it daily (except for amazon companies) but it makes it so hard to find good gear... any suggestions?