Go to Home Depot and try some Hilti t-shank jig saw blades. Very high quality, and lots of variety.
As far as I know, Leatherman doesn't really intend to make other blades, they leave that up to you. Kind of clever frankly, because they let you use high quality and large variety tools from Craftsman, Hilti, etc. without risking having to pay licencing fees. They simply don't tell people that it's a t-shank, and leave it up to you.