Patch Available - JMS 3.18

http://maplestory.nexon.co.jp/campaign/sao.asp

Cash Equips can be found from the SAO/ALO Avatar Random Boxes. Basically you buy the box from the cash shop and it randomly gives you an equip. Hair Coupons can also be purchased.

 Spoiler

SAO
Overall:
Kirito's Coat
Asuna's Coat
Heathcliff's Coat

Glove:
Kirito's Glove
Heathcliff's Glove

Shoe:
Asuna's Boots
Heathcliff's Boots

ALO
Overall:
Leafa's Coat
Yui's Dress

Glove:
Yui's Glove

Shoe:
Leafa's Boots
Yui's Anklet

Cape:
Yui's Wings

All items are unisex.

I'm not seeing any specific information about the dungeon on uni's page yet though.

You'll also be happy to know where Masteria is on the world map.
http://uni-wz.com/blog-entry-2203.html