This seller on e-bay has quite a lot of them:
eBay Store - Egyptian Bazaar: Bellydance: BELLYDANCE ,CROCHET BALADI , DRESS, BELLY DANCE
I think I remember seeing some at Turquoise International, too.
And Dahlal was in Cairo right after Madame Abla died and brought back a huge shipment of what was left in her atelier, so you might e-mail & ask if she has what you're looking for.
Assuming you don't get lucky enough to find a used one here on Bhuz, of course!