It occurs to me that if I had a crochet hook with a hook on both ends, then it would be so much easier to fix a ladder that has both knit and purl stitches. Each time a purl stitch sat on top of a knit stitch or vice versa, all I'd have to do is slide the shaft through the stitch and work with the hook on the other end, instead of having to secure the stitch I've already go a hold of and keep from losing it while I pull the hook out, flip it around, and then try to reinsert it from the other side of the fabric.
I found references to fancy rosewood hooks for Tunisian crochet, but is there a source for basic double-ended hooks comparable to the single-hooked variety found in all the stores?