PCM1702s and IIRC 1704s are 16 pin (DIP), but those appear to be SMD...
As for pulse transformers, did you think about the Newava S22083 or 22160, which seem to be the ones that Jocko recommends?
http://search.digikey.com/us/en/products/S22160/470-1004-ND/555462
Not silly $ either
I had noticed what you did regarding most pfeu pfeu BNC connectors being rhodium (insert material of your choice here) plated 50 ohm connectors...