When I was investigating fiberglass fenders a year or so ago,
Creative Car Craft received universal thumbs up from all who responded at different sites. I hesitated because
volkdent is right in that the front fenders from them are (or
were back then) stock or two inches wider whereas they didn't have a two-inch wider option with their rear fenders.
I, personally, didn't want wider fronts than rears, and I didn't want to go super wide on the rear of my 1302 even though I had planned that originally when I thought I would buy a 1303 first.
VW Innovations uses
Glass-Action parts. They received mixed reviews but most detractors didn't like them under their former name -- Innovations in Fiberglass. Most supporters were more recent customers (perhaps like
Quik).
I did favor the idea of having the fronts and rears widened by the same amount with my 1302. (In the end, I stayed with my stock fenders.)
The original post asked about Mark VI. (Did they raise their Roman numeral?) They did not get good reviews at all -- enough so I did not consider them.