10hp Briggs & stratton flathead

So I am making a gas powered air compressor and I have an old 10hp industrial b&s flathead engine from a old cub cadet. It's a vertical model and I would like to make it horizontal. I have the oil lubrication sorted out just need a bolt for the filler neck. But I'm not sure how to turn the carburetor from vertical to horizontal. Is there a aftermarket carburetor and adapter that could turn it 90 degrees? The model number is 256707 0105 01 8080 21611. You cannot buy a new carburetor for it and I found a new one that matches it and it's part # is 491590.