There is some sort of doll shop at the Narrabundah Shops, near the op-shop. It seems to be only open irregular hours (I’m never around there during business hours, so I’ve never seen it open). I would think that if anyone would know, they would. Sorry, don’t have any other details than that, and a quick White Pages search didn’t turn up their number, so you may have to venture to the ‘Bundah to check it out.

You could check at the Hall Markets or Old Bus Depot Markets.
I saw some really nice traditional-style wooden doll houses at Child Play in Colbee Court in Phillip last week. It’s a new shop, only opened a couple of weeks ago, next to the Chocolate Olive cafe.