Quoted:
The company I work for...
View Quote
Even if you found the documentation you're looking for, they might not be good for much and/or anything, especially if they won't narrowband - they're useless to a company and useless to amateur radio folks if they can't be programmed easily.
I would go about things a different way - find your company's FCC Part 90 license, figure out what frequencies you can legally use. Check out surplus radios from just one decade newer, like the Motorola HT1000, MTS2000, XTS3000, etc. They can be had in narrowband, batteries are plentiful, programming is possible if you're clever about it and available commercially if you aren't.
If two-way radio communication is the end goal, consider starting over fresh with slightly newer gear to get there.