I need to replace my Mode Door Actuator on my '98 Blazer (details in signature) HVAC system but cannot seem to source the part. Been to all the GM sites, ebay, Amazon, etc, even went to dealer sites. Seeking new not used since this is such a common failure point. This is the upper vacuum actuator that is located on the driver's side. Original part number was 52470772 then superseded by 52494116 then appears to have been superseded by 15-72684. Has anyone had success locating this part or it's equivalent anywhere? Thank much!

P.S. I don't need to have the white plastic lever and spring pictured to the left, just need the complete vacuum actuator assembly.