Your right, the real budweiser is a czech pislner Budweiser Budvar. They're not allowed to sell it in the US, and the rice malt Busch Budwieser cannot be sold in CZ even if it was beer.
However, the version of the cz pilsner sold in the us is just called Budvar if I remember correctly, they dropped the "budweiser" part of the name on their US export product, and they do sell it at my local grocery store.
I've never heard of Pripps, I'll have to check the beer store for it. If I can't find it there I'll see if I can order it.