Digital recording gear has come down in price quite a bit in the last 5 years or so. Is there not another piece of equipment that you could buy instead that would serve your needs? Getting parts cast from scratch seems like it could be exceedingly expensive.
Also, if you are prepared to try again with a glue of some kind, you could try an epoxy steel of some kind:
http://www.epoxy.com.pk/steel.htmThere are also many different types of cyanoacrylate glues that might work better than regular store-bought superglue. Check a hobby store, they usually have a selection of different viscosities, etc.
I'd probably try an epoxy. You might want to rough up the glue surfaces with some sandpaper if you can do it without making a mess.
Good luck.
Chris