I gather you are in USA, if so try the ARRL which is the US version of the RSGB.

A simple valve / tube AM tuner isn't difficult to make if you're handy with a soldering iron, the hardest bit will be sourcing a suitable HT transformer with LT windings for the heaters.

A suitable circuit is here: http://www.localhistory.scit.wlv.ac.uk/Museum/Engineering/Electronics/history/valvedetails.htm

Good luck,

John
G4WQD