I was just in Summit/Eagle Counties for the past 5 days and my current goggles are ratty as hell (ask the Bears who rode with me and they'll laught at how raggedy mine are).
at any rate just about all the resorts and towns on the way to the resorts have multiple shops and all are having end-of-the-season blow outs.
heck Dillon/Silverthorne has at least 3-6 shops, Frisco has at least that Many, Breck has that many on the slopes, Vail has a ton, etc.
You should have no problem finding what you're looking for.
BTW, I wear glasses too, and have found that just about every goggle these days will fit over mid-sized to small frames. Some are a bit more low-profile, but most i've tried have fit over my glasses with no problem.
I know that the Christie's chain is having huge sales and in Dillon there is a Mountain Discount store that advertises the lowest prices in the area (or something to that effect on their door).
Finding goggles between the airport and the slopes is gonna be like finding seagulls at the beach = EASY!