With no word from Gx3 (original poster) I went ahead and ordered what looked to be the exact same battery from Amazon.de
(Germany) for 5€ (US$ 6.25). The one I received was slightly different (see attached photo) but seems to be working fine.
My original battery was totally dead (a rather sudden death which I believe *may* be connected to a in the CM7 2.2.0 ROM with tethering and/or USB charging) so I was able to use its cable and connector to make the replacement battery. I de-soldered the cable from the original battery, extended the positive (red) cable slightly, trimmed the black (negative) and finally soldered the modified cable into place on the new battery similar to the way Gx3 did. However, because the original cable is quite short, I laid the cable the same direction as the original battery (toward the corner closest to the contacts) which is opposite of what Gx3 did in his original post.
By peeling the sticker covering off the new battery carefully, I was able to re-use part of it once the cable was soldering into place to help insulate the metal of the battery case from the rest of the phone. I suggest making sure the battery is fully insulated before putting it anywhere near the phone. I didn't do so when testing the placement of the battery and cable in the phone and experienced a brief short, but fortunately nothing serious.
Due to the nature of this "project" it's not something I recommend to anyone who hasn't used a soldering iron before, as Gx3 also suggested. Taking apart Li-ion batteries is a risky business, as is using the final battery in your phone. I kept the phone in a ceramic bowl for it's first charge cycle and still now on it's first discharge cycle (streaming internet radio), and I'll keep it in the bowl again for the next charge cycle at least.