I found this while browsing eBay:

https://www.sv1afn.com/ad8310fastrfd.html

"Measure LF to 440 MHZ with more than 90 dB of dynamic range and with the speed of a diode demodulator."

"With Ultra-Low-Noise 5V Voltage Regulator"

I should be getting one in about a week. It comes mostly assembled. NO SMD SOLDERING NEEDED!!! This should make this project much easier for others to duplicate.