Tom,
Checkout cable assemblies and interseries adapters at the CableXperts website:
http://www.cablexperts.com/cfdocs/cat.cfm?ItemGroup=11&itmsub=0&bskt=0&USA_ship=1&c=0According to the website, you can get 1/2" Heliax assemblies made with N connectors installed, then use the appropriate adapters to get back to UHF type connections.
I'll be reworking my coax in the near future, and will be purchasing similar materials.
73,
Chuck NI0C