Need help finding twinsets

[FashionFix]

I need some help in finding a nice twinset (sleeveless w/ls) in black and in white really. Something nice (sweater material) that I could wear to work definitely and to dress jeans up or something. I haven't seen any at places like Banana Republic yet... any ideas?
Thanks in advance.

 

[Curious]

JCrew & Ann Taylor