Here you go. This horn switch was used on Adventurer SE, Sportsman SE, etc. The vinyl cover had a big wood-grain inlay, which apparently Chrysler thought was really spiffy. Mopar part no. 4019251.
Ahh that makes sense now. I have never owned a van. You might want to try on For Trucks Only. The link is at the bottom of this page.You will probably still need a new/different cover but may be someone has repaired them.
