Now Kingy, you've shown you're quite keen on interesting projects and not averse to punting a bit of cash in the direction of EBay....
Just looking to see whether there were any Mode C Transponders on offer there (see another thread!

), when I came across this ideal
project for you!!
I'm sure a few of your mates from PPRuNe would chip in towards it!

[edited to reduce number of typos]