Right, here goes.
I have some Pi Shields available, there are a number of configs available.
Just the shield, where you supply the ARF and solder it on etc. The pic below is it in the case with a ARF loose fitted to give an indication.
The shield can be supplied with an ARF, which can be soldered on for you if you don't want the hassle.
I can also solder on an SMA adapter onto the ARF, it will just fit into the Pi case Lee has in the build documents, but will need the end plate drilling to make space for the connector.
This board, if you choose to also choose to have the ARF mounted, I believe will enable you to build a PilotAware Pi based unit without the need for a soldering iron.
http://www.charge4.co.uk/pilotaware.html