maybe try kerrits,elt or animo?
I think Tuffrider is having a sale on their neon breeches. 50% off!
Smartpak.com (I recommend pipers) and Doversaddlery.com
I honestly just go to Wilco for my breeches lol
Dover Saddlery is good and horse.com has a good selection for good prices as well as Stateline Tack
Dover Saddlery has a lot of options for colored breeches.