Year-A-Round is still in business, and they still sell parts for the cabs they used to make. Visit their web site at <!-- m --><a class="postlink" href="http://www.year-a-round.com">http://www.year-a-round.com</a><!-- m --> and point at parts list on the left to see the parts they offer. At the bottom it says to call for parts not listed. I'd give them a call or email, I'd bet they can get you what you need.