Marty,

Take a 40 meter board and convert the tuned circuits to 80 meters. A bit of calculation for the Low Pass Filter will be in order, but it should be quite do-able.
Look at the Elecraft K1 2 band board if you are wanting for component values for a 5 element low pass filter for 80 meters - the toroids are wound on T37-6 cores.
For a series or parallel LC Tuned circuit, the Mini Ring Core calculator can give you the values required.
See http://dl5swb.software.informer.com/ to download the mini Ring Core calculator.

Creating your on modification is rewarding - or build from your own design. Experimental Methods in RF Design is quite helpful for designing your own or adapting someone else's design.

73,
Don W3FPR