Bod
I have some of these Skarsten scrapers, and have been collecting them for some time. During this period I have kept a fairly close eye out for spare blades, and although I have managed to find a couple of new packs I have to say they are as rare as rocking horse's. However I think, some time ago, I heard someone mention a possible alternative; just can't remember who or what it was. Now that may seem totally useless, and its not far off, but what I can tell you for sure is that the alternative was well priced and was NOT the Skarsten brand.
FWIW I have also managed to resharpen some of my blades. I certainly would not throw any away unless they were very bad, mostly because of how darned hard they were to come by in the first instance.
I quite like these tools for some jobs; I know a well sharpened cabinet scraper will out perform them, but they still have a place in my arsenal of tools!
Good luck in your search. The blades are called hooked scraper blades, I think.
Caz