Halcon were butchers, snip and clip shop, they went away a long time ago. The Radio Shop in Ontario, CA...the guy is "o-k" but just a repair guy, meaning he can follow a schematic, and fix things, but that's about it.
There in one guy, who used to do radio work, and still does but only for a small select group of people that know him personally. Although, there has been talk of him possibly getting started again soon. PM me, and I will contact him and see if it's OK to swap info.
He lives in Villa Park, CA and used to live in Riverside, CA years ago.