Enhance and upgrade Aalborg theme / asking for professional templates

I noticed that there are not really many usable themes for elgg (responsive and professional maintained regularly). So I think it would be great to enhance the default responsive Aalborg a bit and make it more up to date in terms of design. Just a suggestion.

And a question: Maybe there are some other plattforms which offer professional templates for payment? Here in "plugins" there are really only 1-2 usable and up to date, and some of them "FX Theme" have not so small bugs, surely there are professional template somewhere?