To the best of my knowledge, Lapua doesn't make belted cases. Of all the manufacturers, Hornady has done the best job of supplying reloaders with components.
True, they stopped producing it in 90/91, from memory. As far as I can remember, they made both 300WM and 300 H&H. Maybe 7mm Rem also? It's been a long time.
I bought mine prior to them announcing that they were stopping production.