Wooden Teddy Bear now owns the rights to sell FD blades in the US. You can still use the original FD site to place the order, but they're coming from WTB.
I've used Olson blades for years. Their MS series blades are my favorite for general scrolling. Until recently, I've only used FD's spiral blades, but I did buy a few FD-UR blades to try out. So far I like them.