Covina TRU had quite a few Holo Grievouses about a week and a half ago. But I don't know about now. I wasn't too interested.
By the way, I don't get the whole 1st Day sticker thing. That's pretty silly to me, seeing as you can easily just peel away stickers and affix them to a figure you want to be 1st Day. I did that by taking a sticker from a figure I opened and just put it on an extra Rex, just for the heck of it. You can't tell the difference.