It's been a while, but I finally got round to listing a whole bunch of cool singles on ebay. Some real essential Glam, Hard Rock, Bonehead, Punk and Powerpop stuff to complete your collection.
All have sound clips with low starts.
You can find them here Link to PUREPOP1UK ON EBAY
One great single is this one by Sweet Wine from Minnesota released in 1970
As well as the super rare Killer Frog single
Here is the full list -Good luck!