Back about 2005, the French roleplaying magazine Casus Belli published a couple of brief articles and a scenario set in Ind. It is, as far as I know, the only fan-made publication for Ind out there. The scans were online for a while, then disappeared. I’ve acquired new scans and have uploaded them here: you can find them under Downloads => WFRP2. Enjoy!
Here’s a rather fun site, designed to create ambience for a monastic murder mystery, in honour of Umberto Eco’s The Name of the Rose, but easily usable for WFRP games too: the Name of the Rose Background Ambience Generator.
It has various sliders you can use, including some to create an especially spooky atmosphere appropriate to this time of year.