Manual Brake Pushrod- '71 Dart

I have been driving my '71 Dart for over a year now with a broken brake booster. A booster for a '71 Dart with a /6 has become a rare item apparently. Over the last 3 years, I've repaired mine twice and last year it broke for the third time and I can't fix it. None of the parts stores can get it and the company who used to rebuild them can't even get the diaphragms anymore. I'm tired of trying to find one (can't afford to buy it if I found it at this point) and I'm sick of having to put both feet in the pedal to stop. If someone has a manual brake pushrod lying around, I will gladly buy it and pay for shipping. I used to have a '60 Bel-air with manual drum brakes. I had no problem stopping that battleship, and I'm sure I'll have no problem with manual brakes on this little A body. If anyone can help me out, I would greatly appreciate it.