Are you getting those from http://www.subarupartsforyou.com? I've been looking at the clips that they offer on there for my rear bumper and other spots like what you need. Some of them are tricky to tell if they are meant for that exact spot or for another place! Good luck finding the lowest price. That shipping cost seriously sucks...
ugh...while SubaruPartForYou screws you with a 12$ shipping fee (and will not walk down to the post office and ship them for less than 2$) my local Subaru dealer parts department just told me that they are now 15$ each in his system......urgh.....
getting a few of these little buggers.....
I bought an assortment of clips from "subarupartsforyou.com (door panel, trim for the bed , ect.) that way the shipping wasnt as bad, just a tip, when replacing the tail gate trim buttons, use a little glue behind them, (epoxy works well), most of the time they fall out slamming the tail gate after they have become brittle.