I remember that someone made a rear spoiler that goes at the top of the hatch. They were going to do some aerodynamic tests, and I was wondering if this thing was any good, and if you can find them anywhere or if they have to be homemade?

It went right there and stuck out an inch or two.

Like the one on the late 80s/early 90s version of the Toyota Supra? I thought MSA had that at one point but I don't see that now on their site.

Only just noticed the US cars don't have a spoiler. All european cars have one as standard so I presume they are available thro your dealer.