Was thing along the same lines. Good luck on tracking! These thing are mutiplying faster than a virius!
Some other info maybe to add to the breakdown.
UPC product code # if possible.
FCC ID number if has one for either or both 27 & 49 mhz.
Seperate/intergrated charger.
All avaiable freq 27, 49, 40, 35, whatever in the line.
Number of bat's required. { 2AA or 3AA + 3AAA etc }
Any or all removable/customize parts.
Where usualy found. Walmart, Toys R Us, RS Generic vendor.
This may require a databae or a spreadsheet to keep strait.
PS: I figure why we are seeing seperate control/chargers now. Simply easer to get past both FCC and any copywrite's problems.