The part no is 273-255 12V DC High-Speed Hobby Motor.

It is $4.29 USD at [link=http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=273-255]radioshack.com[/link] or $4.99 CAD ad [link=http://www.radioshack.ca/estore/Product.aspx?language=en-CA&product=2730255&category=Motors&catalog=RadioSh ack]radioshack.ca[/link]

I selected this motor because it is 12V and I can run it off of my field box battery.

The switch is part no 275-1547 .5A SPST NO push button.
[link=http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CT LG%5F011%5F002%5F015%5F002&product%5Fid=275%2D1547 &hp=search]radioshack.com[/link]

[link=http://www.radioshack.ca/estore/Product.aspx?language=en-CA&product=2751547&category=Switches+Switches&cata log=RadioShack]radioshack.ca[/link]

Edit:

I just checked the current draw and it is 2.7A when turning over an .020, so the switch might be a little light, but it's only run for a few seconds at a time.