LBD Wanted.

I'm on the hunt fot a Little Black Dress for my Graduation which is only a month away, i have plenty of little black dresses but none appropriate enough for my uni graduation so i'm on the hunt for a nice preferably with some sort of sleeve, as i get cold easily and i can't wear a cardigan or anything...

if anyone has any suggestions on where to try i'd be grateful.

p.s it needs to be cheapish or at least reasonable as i'm short on moneys.

P.p.s it needs to go with these shoes.