Is that a dealer item? Because my local auto parts store definitely doesn't carry them, sadly.
Prolly expensive at the dealer; should be cheap at a junkyard but going in for just a little part like that sometimes makes them unreasonable. If you need anything else at the junkyard, go buy that now and get a couple fasteners as an afterthought.
Or - open up the panel again and try to make do without. First look at the corner that isn't closing up - it might just be that the fastener parts aren't aligned. Or, it one really is broken, maybe the broken pieces are what's keeping it from closing, so just remove them. Or, maybe you can take another one from a less critical spot and move to that corner. Or, maybe you can rig something to work there.
Bottom line - just look at it more closely and find the exact problem. Post again with pics if the cure isn't obvious.
