title says it all.

Steam has it: http://steamcommunity.com/app/22320

And all mods/patches/etc works with Steam version.

Other than that, check Ebay and local video game stores.

...or get the anthology...Elder Scrolls 1 through 5. It's $80 and ES 1 and 2 can be had for free, but it HAS MAPS!!!

Unless you want to wait for the Anthology, Steam is probably your best bet. Local game stores are going to be hit-or-miss, while on Ebay, most of the available copies have been snapped up by scalpers collectors, and could be very expensive.

Amazon has it for around $25, but it's just the disc in a jewel case.