I have a brand new, never used Sturmey Archer 8 speed internally geared hub. This works great with a jackshaft kit. I have used this particular model myself. I bought 2 at the time so I had one for spare parts. I have since switched over to a Sram hub because the Sram one is black and I wanted black hubs. Here is the link to the Ebay auction.
https://www.ebay.com/itm/222829830269?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649
https://www.ebay.com/itm/222829830269?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649