Pci USB risers version 5 or 6

Anyone know a good place to buy PCI risers, version 5 or 6

I recently used cryptomined.com.
Highly recommend.
Fast shipping to Australia.

On ebay, several models of version 5,6 and 7.
Do a search with "riser usb" on ebay, and look at the photos to see the version.

Here a version 006C:

taobao.com has them for ~5USD, you need to understand Chinese to use the site though.
Alibaba's a great place to start if you want to buy in bulk for ~4USD or even find the manufacturer themselves and deal with them.
All would be shipped from China so it'll take a while for delivery depending on your location.