I just though I would post this here as another board member just asked me about them so figured I would share with everyone.
For anyone looking for graded card bags for tall boy slabs (fits both PSA and SGC) here is a website that sells them and I been very happy with the product. They help prevent any scratching on slabs and are an added protection when mailing slabed cards.
http://www.craftercity.com/CLEAR_PEEL_STRIP_BAGS.htm
Product Details: Re-sealable Clear Poly Peel Strip Packaging for your Artwork, Matted Frames, Notecards, Document Preservation, Magazines & more! Acid free, archival, museum quality packaging.
I order the size- GBM-B4X9 4 5/8 X 9 3/4 they are .12 each plus postage per 100. They also have another size that can fit them, I think it’s a little tighter on the sides but longer top to bottom, I have ordered both. I have been very happy with them.