How can we find a van to drive us from Kunming to Dali (two persons and two bikes)? And what will be the costs?

The Xiong Brothers might have a few tips for you, or even the number of a bike-friendly driver:

www.gokunming.com/[...]

WeChat ID: cfso1932

His name is Forrest. He speaks English. Is super reliable and should be able to help with your bikes. Chat to him about costs