Miles, don't know what all you are looking for but here is a Wideband with knock sensor data logging.
http://www.fastwrx.com/turboxstuner.html
kind of pricey though. I think that I read a thread somewhere that you had the Tweecer. is it the RT. I don't know that much about the tweecer yet (will be getting mine soon), but can you log whatever you want. Cause the EEC has a knock sensor input on I think pin 23 or so. And I believe the Cobra used this, but not sure if the 5.0l cobra 93' used a knock sensor or not. but if it did you shoud be able to use that sensor for you app. since it will be tuned for the 302. maybe something to look into. But then I guess you would need to know if the Tweecer can log that input or not. May be a cool trick though.
Scott
Oh yeah finally got some Datalogging on my WaterInjection. I will be posting some info as soon as I get it all organized and compiled. But so far looks good I was seeing about 100 deg difference in dischage to TB temp. :lol: