[Espy]

There's a Sarya's Sash for 1.5k in the shops, and such. If you search for, say, "blue" (actually, especially blue, because only the "blue" items have that in their name), you can see all of the items in that shop without having to go through pages and pages of colors.

Well, except for a few special items, like Sarya's Sash, Tune-Up stuff, different sets, the jade set, etc. But most commons can be found that way.

If there's any particular sort of sash you're looking for, I can help you there as well.