There appears to be two versions and the $50 seems to have been some list price, I found a few places that sold some for almost half on Amazon and eBay here's a pic of the two versions, I too would be tempted to try the "SUV" version on my hatchback but without the bulkiness these bring!
How much demand are there for these types of mirrors (of a large variety of versions size etc!) turns out an old contact of mine in Germany is the manufacturer of them!