Vintage Synth Explorer (www.vintagesynth.com) is a comprehensive encyclopaedia of electronic music equipment, a great and informative read. In addition, there’s MP3 downloads of the gear, such as classic, cheap and rare drum machine loops and hits.
Some of the material may be subject to copyright, so best to ask if not sure, but there should be no problems with single samples and presets. A must see site!

On first sight it looks nice. Will go deeply in it some other time. (to tired to read a lot)
Thanks for posting.