Air con pressure switch and recirculation flap codes

[Mr. JLT]

So I think my A/c high pressure switch went out/failed. I came out from a shop and I had just bought 2 new front tires and got them mounted 1 hour prior and I though that I had ran over something. I felt around the passenger tire but didn't find a anything-but there was a hissing noise behind the passenger tire and the air smelled a little funny. So when I got in the car and turned the a/c on nothing happened/No cold air and I had just used the A/c on the way over to the shop. So when I got home I pulled these codes:
00792.Air Conditioner pressure switch F129

01274.Motor for Air Recirculation flap V71

Where's the cheepest place to get a new pressure switch?
And I need a new 02 sensor too.
Thanks