Since I am about to re-purpose the Kenwood Keg in another vehicle, I decided to go on an Ebay mission to see which stereos were around that the Keg might directly fit to.
The S220A is like gold dust and so I thought it appropriate, whilst I was looking on Ebay, to get a list of model numbers that could be PB compatible and make a note of them.
I haven't done any further research than examining the pictures for the presence of the 5L port.
Here's what I found:
Compatible
KDC-W7031
KDC-W6527
KDC-W5031
KDC-4527
KDC-W4041
KDC-4024
KDC-W3537A
KDC-X579
KDC-MPV525
KDC-MPV5025
KDC-MP425
Not Compatible
KDC-W4031
KDC-W3534A
KDC-3051
KDC-W3044
KDC-W3041A
KDC-3041
KDC-W3037
KDC-3034
KDC-3031
KDC-3027
KDC-3024A
KDC-3021
KDC-344
KDC-311
KDC-309
KDC-237
KDC-241
Unknown
KDC-4027
Possible?
KRC-394