I am looking for some guidance or examples of beam antenna design utilizing wire linear loading networks to shorten element length.

Two antennas that come to mind using this technique was a Wilson 2 element 40m beam and the Hygain 'Discoverer 7-1 Dipole, and 7-2 Two el beam model,
The Hygain antennas are still in production and offered by DXEngineering. Manuals with dimensions and physical layout are available online from MFJ/HyGain.