Day-lab DIY [1] is using vintage Charles Harper cross-stitch patterns to make unique framed art pieces, pillow covers, and other gifts. A huge fan of Charley Harper myself, I'd love to get my hands on some of those vintage patterns, but that's unlikely. So, Todd Oldham [2]'s book Charley Harper: An Illustrated Life [3] might be the next best thing.
Source [4]