Re: There is a solution to this
Sorry, Mr. Worsthal, but I very much doubt that you sell an aluminium alloy with the necessary characteristics. I'm not being rude, but the problem here is almost certainly with the cross section. If you use an alloy with an extremely high E value, it will just crack rather than bend. With the sections they are using, even making it out of high tensile steel might not solve the problem.
There's another company that uses a magnesium alloy frame with an outer mould of polycarbonate, but everybody laughs at them because it's "not premium". They don't seem to have this problem.