Batboard

I've tried the usual places and google. Just thought I'd try here to see if anyone has seen these batteries anywhere.

Also, looking for old ones to cut up and rebuild.

Thanks

Try Battery Jack, they handle a lot of the 'old' batteries for the HT600, GP300/P110 as well as off brands, they might have or can order a battery or three for the MX series.
1.888.307.6937.
Try Battery Universe as well.