Haven't really tried custom clothing for 1/6 lately but if you want to find older Azone clothing, there is the abyss known as
Mandarake and
Dollyteria For Mandarake's case do be wary of which outlet you're shipping from since they can't combine orders from different outlets
If you are comfortable with
Yahoo auction Japan and the Buyee service
Have you tried searching under
Momoko doll/ Kurhn/ Jenny on ebay? My S Neemo manage to wear one of Momoko's looser shirt and Kurhn's qiapo. I would have to dig out the Jenny skirt to see if the waist closes.
.... I should stop looking too deeply myself....