Vacuum Selector Valve search

[Detroit Diesel]

Hello. I have an '86 Silverado with a leaking HVAC vacuum selector valve. I dismantled it to see if it was repairable and it appears that the plastic backing plate is cupped with age. So I cleaned and reassembled it and it's still sucking in air. It also now has a broken retainer tab
I've been searching online for a new one and everywhere I look they're out of stock. Anyone know where I might be able to buy a NOS or aftermarket one of these?

ACDelco 15-17220
GM 16037769

https://lt-truck-gmc.7zap.com/en/k25+k2500/49204-1986/0-0-1595538091/0-1623686518-0-0/#6

 

[Craig 85]

About a year and a half ago I did a search for that part and couldn't find any. I ended up buying a complete NOS HVAC control. The link is for GM 16034591 or ACDelco 15-71268. It's $186.

https://www.ebay.com/itm/GM-1603459...AC-Heater-Control-Chevrolet-GMC-/233724705627

 

[Detroit Diesel]

Thanks Craig. I looked at buying the whole HVAC control assembly as well but as rest of the assembly is in great shape I really wanted to get just the valve.
I ended up buying a reconditioned valve (15-71032/16037768) from Tom at [email protected] for $29.
http://thepartguy.com/ac-controls-chevytruck.htm
Turns out it's the same part as the original ACDelco 15-17220/GM 16037769. Not really sure why they are coded differently. I even disassembled both it and the original to verify the vacuum channels in the rubber seal are an exact match. They are.
I installed it over the weekend at it works great.