I had to find clinicals for NP school and will have to find them for DNP school now. Here's what I found worked...
Join the local NP organization in your area. A google search will help you find it. They typically help you find preceptors or at least allow you to mingle with others and get recommendations.
I put together my CV and a letter of introduction. Then did an internet search of all the local sites around me and got the office manager's name. I got dressed up and one day went door to door with CV and letter in hand and tried to get in to meet the office manager. If they weren't available, I left my papers and called them to follow up later. I managed to get clinical sites this way.
Network. You never know who knows whom. I had a fellow nurse who had a brother who was a DO. A preceptor who unfortunately got laid off before we started referred me to another preceptor. A previous nursing school
instructor who worked part time in a free clinic turned out to be the best preceptor I could have asked for.
Lastly, the Take Care Health clinic takes students. Go to their website and apply. You might get lucky.
Best of luck. It's not easy, but also not impossible.