I would go with Doyle and Chris Howes (which I just did). IMF sails are tricky and the price I got seemed fair. As Peter said"You order by phone and they ship it to you". What is not to like?
A buddy of mine used an off brand non Catalina sail maker for an in mast furling sail for his Catalina 38.  He had to return it twice to the Canadian agent and lost most of a sailing season.

Best Regards
Jeff Smith
www.http://JeffSmithPhoto.Net
732-236-1368