How do I find a criminal defense attorney who doesn't charge a flat rate (charges hourly)?

I'd like to find a criminal defense attorney who works in Fort Collins, Colorado, and charges by the hour instead of a flat fee. So far, the attorneys with whom I've spoken charge $3-5K for pre-trial work. My problem with this is that if the D.A. is amenable to dismissing my charge, then these types of attorneys would end up doing 1-2 hours of work, making their hourly rate over $1000. It doesn't seem right to me.