How do I find a discontinued part (#9463042) vacuum bellows

What is your question?

My 940 wagon is almost perfect... except for one discontinued part I need. The vacuum bellows apparently helps channel the air from the AC. When I accelerate, the air no longer comes out of the dash outlets. But when I take my foot off the pedal, the air blows out of the dash vents. Having the air coming from the dash outlets is necessary in summer driving weather. I have scoured the net, and cannot find a new or used version of this part. Help!

What makes this problem better or worse?

Foot on the gas determines where AC air is channeled.