I wouldn't say impossible. You can definitely still find NM. I have a pretty nice Deluxe set that I'd say is pretty damn close to mint. Best part is I picked that up for $30 at a flea market.
There actually not that hard to find, idk how "mint" you are looking for though.
Check your local craigslist, I see one floating around on craigslist Cleveland every so often for around $100. Also, check out local exchange/video stores and ebay.