Just thought I'd post to say my tuner kit turned up fine, and apart from losing a resistor (fell on the floor somewhere, and I couldn't for the life of me find it!), construction went fine.
Not done any soldering for a good couple of years, but had no problem with this - instructions were stunningly good. Took me around 5 hours to complete (I took my time), but as I didn't have a PSU to supply 12v, I couldn't test it, so I took my life (or at least, my tuner) into my hands and just plugged it right in to the car sled. Worked first time, absolutely spot-on!
Really pleased with it, I'm amazed with how sensitive it is (I'm picking up foreign FM stations from Southampton!), and how fast it tunes from one station to another. Software is also fantastic, although the black text on white background for the station info is a little annoying.
While it's true that radio isn't really necessary with the empeg, I'm very pleased with this - I've missed listening to the radio on occasion in the car, and I think I might now have the best car radio as well as the best car MP3 player! Thanks to Patrick for making the kit available.