The antenna shown uses fiberglass tent poles. They are 2ft each. The
larger version uses fiberglass rods from Tap Plastics. They are cut to
fit the back of my suv, something like 65 inches. I'd love to use the
antenna with the amount of wire indicated on the Wellbrook site.

I suspect someone could roll their own Wellbrook. I believe they use a
very wideband transformer and a low noise JFET amplifier. You can find
wideband transformers on ebay (North Hills). JFET amps aren't that hard
to build. The transformer lets you float the loop and does the double
to single ended conversion.