Yes I also found the Texas company and they can make up just about anything you need. Sadly they quoted me $155.00 for the drive I need. Not going to put that kind of money in one. My Steward Warner 90 degree drive is also missing the end cover adn the gear it covered. I was quoted $110.00 for just the gear! Seems like there are plenty like that as several used tractor parts companies have the drives missing the same parts! May never get it working again.
Cheers and good luck as well!