Texas Tool Crafters (no affiliation) used to sell a replacement straight-edge S30V blade for the Wave. I have one on my modded Rave and one on my Signal. I don't have a source for these any more, sadly. They do sell replacement blades but not the one I have.
They still sell some blades and modded tools through Amazon. They sell a Damascus blade for the Skeletool that I've been sorely tempted to order for a while now...