Key Lime Bars

Have you had these?  Oh. My. Gosh.  They were on sale at Harris Teeter last week (BOGO, I think) so I picked one up.  All of the muffin mixes were gone and only these and Lemon Bars were left.  (At our house, we like lime much more than we like lemon.)  I waited three days before making them and they lasted a whole two days in the fridge.  They were aaaaamaaaazing!
I searched allrecipes for a "key lime bar" recipe and got nothin'.  Does anyone have a recipe close to these babies?  That would be outstanding!
Thankyouverymuch!