There are three companies you'll need to order parts from.

1.) Model Kit Bearco Marine Model
To order the kit e-mail info@bearcomarine.com they charge $22.00 for the kit. (Request the Lindberg Tug Kit or the "Boatnerd one")

2.) Radio and speed control - Tower Hobbies
The 2 channel radio allows control of the rudder and speed controller.  The speed controller allows variable speed (both forward and reverse) and includes stop.

Radio: Tower Hobbies Brand 2TS 2Ch (No Servos) -- $29.99
http://www2.towerhobbies.com/cgi-bin/wti0001p?Q=1&I=LXXD91**

http://www2.towerhobbies.com/cgi-bin/wti0001p.pgm?Q=1&I=LXZS09&P=7

3. Hobby Lobby - Motor, shaft, prop and servo
Motor and shaft - Comes as 1 pre-assembled piece
http://www.hobby-lobby.com/scaledrives.htm
Order GR1039 Multispeed 380 Boat Drive  (The smaller one in the photo.) -- $34.70

http://www.hobby-lobby.com/servos.htm
HTS081 Hitec HS-81 Sub Micro Servo (used to move rudder) --$17.60

http://www.hobby-lobby.com/grboatprop.htm
3 blade prop for 4mm threaded shafts.
(Choose right or left turn prop 30mm)
GR230830 30mm, R -- $3.20

If you want to scratch build parts you could use a single servo for the motor and that allows variable speed but doesn't provide as much power. The Moonlight Modeler suggested this and Tom Hynes has built a few this way. The up side is it would be about $65 cheaper this way. You could also use a cheap motor from Radio Shack.

Click here for instructions to build using many scratch built parts.

**Inexpensive 2 channel radio with 2 standard servos. Use one servo for motor & one for rudder.

Here is a good site for scratch building stuff:

http://www.ktis.net/~wzumwalt/howtoo.htm (links at the bottom of the page)

**Radio Frequencies
Regulated by the FCC, your R/C transmitter must operate on a "Surface Craft" channel. In the future a group may meet up and run the tugs together.  Please use the table below as a guide to open frequencies.