Uh oh... I don't want to hear that (as CarMax is putting the finishing touches on a windshield re-replacement now and I'm hoping they didn't re-use these clips.)
If you did not hand them two bags of A pillar clips then I highly doubt any windshield shop will have the specific hardware. Do not fret it is easy to DIY. When you get the vehicle back grab the trim pieces. If you can move it at all replace the clips..