Hey good luck with your dad. Great ideas so far. But just thought I'd let you know if you don't find what you are looking for at the Overland Park show there is another bigger one on the 28th of this month up by the Kansas City airport. Not sure how close you are but it just might be worth the drive. I posted the link to it in another tread about the Overland Park show but I'll post it here just in case.

http://www.kcherp.com/

Again good luck!