I have a few CDs but my favorite Doo-wop is when me and my buds get together on Thursday afternoons and do it. We simplify the originals to fit our capabilities.
I recommend it highly. The lyrics are easy to find on the net and if you have any instruments available, it helps keeping things together.
Someone developed a doo-wop chording pattern (I VIm IV V7) and there must be hundreds of songs that fit that pattern. Then someone replaced the IV with a IIm and - batta boom - hundreds more.
Enjoy!!!!