Looks like you found the site. I know you can get the kits fully made. I'm not sure what the exact cost. It depends on the quality of the transmitter. I have the cheap one and the good one. The cheap one was $30 and works fine. The better one has dip switches that allow you to program the frequency that you want, and it has better control over the frequency.... meaning when the battery gets low, the transmitter stays locked on the frequency that it's transmitting on, unlike the $30 model that drifts a bit.

The sound quality is not bad. For playing around the house as ambient sound, it's excellent. It sounds like any local radio station. It doesn't have the dynamic range or frequency response that a CD player has, but it's good enough for what i use it for. IF you put one in your car, i'm sure it would sound just fine. At least as a temporary solution. ( i had it im my car for a few weeks, and worked fine.... i just needed a box of 9 volt batteries)




-CHiP