Where can I buy hinges that hold the cabinet doors open?

I have seen a simple spring used. One screw in each end for mounting. Mounts like the Camping World support. Because it is a spring, when the door is open, you simply push the center area of the spring in and it closes the door. The springs are about 3/8" to 1/2" in outside diameter. The come in different lengths and available at most hardware stores.

Wayne