Dash Vents on M450

[patticake]

Try checking in automotive junkyards. I think they are mid-80/90 GM stuff. Maybe on the rear a/c units in vans. Might also be available through a parts store, if you can show them a picture and they are intelligent enough to use a paper catalog. Also, if you have any a/c parts places in your area, show them a picture. They might point you in the direction of a shop that installs aftermarket a/c in cars(if any still exist)