Help with a $465 light bulb

[Mr Hank]

So a couple weeks ago I had navigation put into my my and it works great however when the installer pulled the radio/air conditioning bezel out he somehow knocked out the white illumination from behing the thermostat dial. I went down to Hummer and they told me there is no way to replace the lamp and that I'd have to pay $465 for the entire control module. Does anybody have any technical input on this or where I can get a used module? Not really up for spending $465 on a .20 cent lamp!