If I remember things correctly, what happened was that Commodore couldn't bring the machines into the US. But dealers could, and did - my CD32 was from CEI in Florida. Still, the legal nonsense disrupted the whole supply chain. I think it was only the dedicated Amiga mail-order dealers that tried to get the machines. I never saw one at retail anywhere or advertised by a non-Amiga reseller.
Another part of the question: Dave Haynie wrote in Deathbed Vigil that Commodore might have survived with 400,000 US sales - could they have made that many sales without the supply problems?