Of course an alternative to a brazed control horn is to bring the pushrod outside the fuselage as the kit did for the Jameson Special. You can easily bend the U shaped connecting wire for a two piece elevator, no horn welding needed. The flaps for a full fuse, well that's another story.
I guess eventually we all will be forced to trim down our building for a variety of reasons. We may find ourselves just flying out what's in the hanger until they're no longer flyable.
Why? I haven't used a purchased control horn in any of my regular stunt planes for 30+ years, just make it. Appropriate materials are widely available and inexpensive, and it is relatively simple to do.
In my case, it's not that it was not available or too expensive, but in the particular case of the control horns, no commercial part was satisfactory and did not have the proper configuration.
The pricing issue is as stated above, at this point, someone, somewhere, it manufacturing various parts almost as if it was a one-man operation, and that will never be cheap. Brodak is largely a middle man/consolidator of the wide range of stuff made by others. Of course, to stay in business, they have to add overhead, so going straight to the manufacturer, if possible, would be cheaper. You are paying for the catalogs, the website, and the convenience of being a sort of "one-stop shop" for things you get elsewhere - just like the now mythical "local hobby shop" would have been.
Brett