After MANY years I'm about to get back into the hobby (my 6 and 8 year old kids are the stimulus :-). I've dusted off one of my "newer" radios, an Airtronics 7P circa 1988 currently siting in an Astro Hog. I checked the module and it appears to be a narrow band model (gold R/CMA sticker with a 9/88 date) on channel 56. Obviously, I'll need to replace the battery packs. Is there a good online place to by a replacement transmitter battery pack or am I better off pulling apart the slide-in battery module and just soldering in eight new nicads myself? Thanks!