Hafele Alternative

So finally got majority of my kitchen in and I have an issue with the bi-fold doors the company made for us in the fact they don't bi-fold correctly. They say there is no way of doing what we want (more like they ballsed up!) any how I have seen http://www.hafele.co.uk/shop/p/fold...sets-with-tracks-for-folding-doors/87326/9456

the hafele SF50D for door system and looks like it will do the job all be it I will have...

Hafele Alternative