This support is pretty universal, it accepts spools up to 100mm wide (different slots) and roughly all the diameters (150 to 400mm).
This support can be placed on a desk or mounted on top of machine as in my case (glued with some double-sided tape).
Works well even with the filaments little tangled on their spool.
Requires only 4 ball bearings (outside : 13mm,  inside 4mm * 7mm width) :http://www.banggood.com/10pcs-624ZZ-4x13x7mm-HCS-U-Groove-Sealed-Ball-Bearings-Guide-Pulley-Ball-Bearings-p-989200.html
And if it does not suit you, you can massage your back with    ;D
Lien vers mon article en français : http://chezcyril.over-blog.com/2016/01/devidoir-universel-de-bobine-de-filament-imprimante-3d.html