Hi! Welcome to YT!! Always glad to have more Iowans here! My 2 yorkies came from out of state, but maybe someone else can help you with Iowa breeders.
There is an Iowa breeder right now that is looking for a new home for an older yorkie - maybe that would be a possibility for you right now, as an adult wouldn't need the same time in training as a puppy. Here's the link to her thread:
http://www.yorkietalk.com/forums/sho...highlight=iowa
She's a real cutie.
Also, just so you know - Suzy (another member here on YT) and I will soon be planning our 2nd Central Iowa Yorkie Meetup. We're planning to do something in Feb. inside somewhere. We had a meetup in October at Gray's Lake & had 14 yorkies show up with owners ranging from their 20s to their 80s - all we did was post fliers, post on YT & had an announcement in the paper. We even had a couple stop by that was interested in getting a yorkie. Let us know if you would want to know about a meetup. Also, right before Christmas, I met an ISU vet student at the airport that has a yorkie.