Ack - sorry to hear that lyn* - must be one of those cases where they don't always have the same stuff in various Costcos. If I remember right - you're in Canada aren't you? Lots of times I'll tell my Mom about something in Costco, and it's not there at her Vancouver stores.
There are some things that are kind of regular there though - I did recommend the non-iron button down shirts for men (Kirkland brand) ...my Mom bought one, and then went back and bought several more for my stepdad. They a lot of the same foods too.
In terms of clothing and accessories - I think this can vary wildly. And a lot of these 'one time deals' are just that...only at the store temporarily, whereas the Kirkland men's shirts are there all year round.
I think it was just last fall that my local Costco had Elliot Lucca handbags for some insanely great price. But once they were gone, they were gone.
Sorry you didn't find the skirts...:( Hope it wasn't a totally wasted trip for you though. Did you get something at least? Maybe a five year supply of ...olive oil? A three year supply of Kirkland body wash? (I like that stuff a lot btw....it's orange scented, and very nice quality).
Hope it wasn't a wild goose chase, and that you had reason to be at the store anyway.