There are several other styles of pants with the metal clasp, rather then the one you initially tried. I didn't see many with the drawstring, however.
[Maybe if they move to the sleepwear area, or workout section. Not that Jae-Ha is aware of this.]
A number of sweaters are also available. The one you have on is one size larger than you probably wear, but for obvious reasons. At least that's one kind of top you can work with, right?