I would think those dopey goggles from high school chemistry would suffice. I think they're pretty easy to find... like a hardware store or Wal-Mart or the illustrious Internet. Or...
Really tight-fitting swimming goggles to go UNDER the glasses? I have no clue if it would work, but it sounds like an idea. TYR makes a style called Socket Rockets that are very low profile. I work at a Big 5 and we carry them. Just try it in the store. Or any other sporting goods store, I'd think.

Military sand wind dust goggles - I've a couple pairs (day goggles and night goggles) and they both fit over my glasses no problem

why do you need to see.. just go with the Braile method.. it can be more fun and you'll meet new friends.

YES! I DO I DO! I swear by Ranger Joe's. I bought a pair last year for $17. Google the website and order fast...it takes a couple weeks to get it *I think!*

I have used ski/snowboard goggles for the past two years, and they work great. You want to find a model that is listed as "OTG" (stands for "Over The Glasses"). These have a bit more clearance for your glasses and wont push them up against your nose. you can often find these on sale, since it is the wrong season for ski gear.

my quick search turned up a bunch in the $29 to $50 price range. you might luck out on Craigslist or something. just make sure the foam isn't falling apart. (the foam around the face is made of something that automatically self destructs at 5 years so you are forced to buy new ones.)

get the cheapest ones you can find... the dust and the activity will scratch the lenses to hell, so you won't want to use them for skiing after Burning Man. Some of the popular models are
Smith Monashee (campmor dot com has these for $29.97 right now)
Bolle X9 (campmor has these for $39, or $49 for the cool mirrored ones!)
Scott Heli or Scott Storm or

There are also Motocross (motorcycle) goggles
Scott 87
Smith Option

FWIW....I wear Daily use contacts only one week a year.

Yes! These work great! They were recommended to me a few years ago on Tribe from other people who wore glasses.

Big Ben goggles. tinyurl.com/8f6ab (You can also google "Big Ben Goggles" & you may be able to find them for cheaper).

They have removable lenses. I bought the clear and smoke which was wonderful for daytime dust storms, so I'd still have some sun blockage. They fit and felt wonderful, I highly recommend them!!