Not in the US, I was in England and now France. When I ordered an SPU Royal N originally I was told a three month wait. I think this was a guess on the dealer’s part as it arrived in two. I think they’re made in batches and are quite slow sellers so the batches aren’t made that frequently. (This is a guess on my part.)
When I sent it off to Denmark last spring from France with a misaligned cantilever (from under biasing) it took around three months to come back. The more popular SPUs might be in stock somewhere at dealerships but it’s partially a matter of luck.