Where can I buy a 4-cell battery for the Vostro 3350

I received the Vostro 3350 from my outlet order last week for $507 shipped. It looks ok, like a budget business model (silver color, maybe red looks better?) but the build quality is very good and has a tough feeling. also, this is by no means light weight even though its a 13" model. also, the backlit keyboard does its job even though its non-attractive.

now, getting to the point, where i can order a 4-cell battery for this. i couldn't find it anywhere except for dell who wants $139 something for it which is outrageous imo... thanks in advance

 

Ebay is usually the next best resource but it doesn't look like any batteries are available for the 2nd generation Vostros yet. Keep looking or save up for the Dell battery, I guess :/