I know they are a little more expensive then finding parts on the internet, but those are the businesses that you need to support if you want to be able to have any track at all...especially one in Iowa!
I've talked to quite a few people and I've heard there's one down by Des Moines and the one in CF and that is pretty much it.
Hopefully as Extreme R/C takes off, the part time owners will be able to dump more $$$ into creating an awesome track. But given the area and the interest level expressed there...I think they've done pretty well.
Give them a couple years. They haven't been there that long. Express to them what you don't like about the track. Both guys that own it are pretty receptive to trying new things.
Good luck! Your other alternative is to move up here to WI where they have a few awesome tracks. But the club here too seems to be struggling. I'm hearing that people just aren't getting involved like they use to.
~Whiplash