In all seriousness, I'd suggest that you just look up the results from the last few years' NAIA championships. See which schools always seem to have competitors. Call those coaches up. Even though they're your competition, I'd bet they'll help you themselves and/or point you in the direction of useful resources. RW people seem pretty helpful.
There are/were some decent clips on YouTube, but you definitely have to take those with a grain of salt. Anything with Mr. T in it is probably not going to help...
Good luck. Resolve, in advance, not to get frustrated when you see your kids get beaten by others who you KNOW should be DQed--and aren't. I found it helpful to focus on filming my own athletes--seeing less of the "cheaters" during the course of the races makes it easier to stay calm.
Does the NAIA still have a marathon, too?