John and others:

Take a look at the pac-12 portable vertical.  from pacific antenna;
http://www.pacificantenna.com

Also, you can home brew this from the article at
http://www.njqrp.org/pac-12/index.html


I built one last year, and it works great.  Mine was all home brew, and
only needed some help with the machining and one solder joint.

I modified the design to use one coil and a wander lead.  However, I may go
back to separate coils for ruggedness and ease of setup.

Hope this helps.