I recently purchased through Trademe a couple of really nice leather bags. The seller seems to occasionally have other nice, pass-for-period’ish, bags and belts too.
Such as:
http://www.trademe.co.nz/Clothing/Womenswear/Bags-handbags/Shoulder-bags/auction-155166272.htm
and
http://www.trademe.co.nz/Clothing/Womenswear/Bags-handbags/Shoulder-bags/auction-154561404.htm
They tend to go for really resonable prices, and the seller is very easy to deal with, reliable and quick on delivery.
I found my bag to be absolutley indespensible at Wolfgang for carrying around my spell components.