Many thanks for the link above. A search for RC9001 yields 2 results.
Both are 3.7vdc and have the overcharge circuit.
The 1st one is 2200mAh.
[Link: batterybuyer.com]The 2nd one is 3000maH.
[Link: batterybuyer.com]Price is a bit hefty. The first link is the one folks see on Ebay ranging anywere from 8.99 to 15.99 (from what I last recall).