Ok, longer SMA connectors have arrived, and look to be just about ideal. Molex ones too, so a decent make.
As I've been asked a few times, I will also make them available as a separate item on the website from tomorrow.
As I was short delivered the 2x10 headers, next window for purchase will be tomorrow once the balance of them arrive - the ARF's will be here by then too. Then it will be early next week when some more PCBs arrive.