Try www.dixiegunworks.com and www.trackofthewolf.com both have kits and parts to build your own.
Many stores sell black powder kits.
A hardware store sometimes sells hurricane safety kits.
No store sells the kits try mycustomcontroller.com
Kits were made by Connecticut Valley Arms Otherwise known as CVA
The conversion kit is not a firearm.
Yes, craft stores sells kits to make puppets.
LOSERS
The Red Cross online store sells hurricane safety kits. There are also numerous businesses in places such as New Orleans that sell hurricane safety kits, such as Southeast Safety and Supply.
Stansport has been known to sell hurricane safety kits.
The Servo Shop in the UK sells a wide range of Servos. They also sell aircraft kits, radio controlled cars, electric motors, glow plugs, Black Horse kits and many other accessories.
Considering asking the local school near you where a place might be that sells the kits. Looking on the internet is also a good place to search for what the kits contain and possibly how to make your own.
There are several companies that offer these kits. One obvious company that sells them is Apple. Other companies that offer these kits are Amazon and I Car Kits.