RodKnock,
I think that Fred & Barney might spill their coffee trying to get up to speed.
Mike,
Get something that you can velcro in and remove it when you don't need it. Most stores like K-mart or Wallmart have something that will work.
If you are looking for something more permanent it really depends on how much room you have between your tunnel and transmission. Only you will know how much room that is.