easymanuals.co.uk sell manuals for most marques of cars, in the case of VW Group cars, the manuals in electronics form that they sell are just a snap shot taken from erwin website, if your car is no longer in production then its erwin workshop manual should now be quite stable, so safe to buy and use an older than current version of workshop manual.
There are a few online VW Group parts listing sites, though possibly mainly based in Russia, I frankly can't see much wrong with using a "ripped off" copy of a parts listing as I then just hand over the numbers to my local VW Group dealership or an online VW Group parts provider, plenty domestic appliance spare parts companies use their own sourced copies of part numbers.