I got brand new chinese iBook G3 batteries for $36 each in bulk.

Just buy a new one off eBay. Pick the absolute cheapest seller who is in the USA and buy that one. No one seller has anything better than anyone else - they all pretty much buy from the same one or two sources.

Do NOT buy directly from Hong Kong, China, etc. on eBay. It will takes ages to arrive - if it does at all, and you may have to pay customs fees.