2001 High beam prob.

Lately on my 2001 Astro when I switch on the high beams all lights go out. If I flick the lever back and forth a few times the lights will come on, either high or low depending. I was assuming it's just the high/low switch needing replaced. I looked into getting one and find no listing in the parts??? Does this van not have a "standard" style switch located on the steering column? Any info would be great.

Thanks