I know you know Watch City. Do they not also fit the bill? Or LJ Peretti? Or McCranies? Or Uhles? Earnest question here.This is an interesting idea! Given the restriction on the number of blends, you're more likely to find something closer to the numbere by looking at individual tobacconist B&M operations where they do their own blending. That's pretty hard to find, especially if you want to be sure that they do their own blending and aren't labeling someone else's product. On top of that, you might want your choice to be someone who's recognized for excellence, a real boutique blender.
The only one that comes to mind, makes their own blends, has an international reputation, would be Wesley's of Johannesburg South Africa. Blog | Cigars | Smoking Pipes | Smoking Accessories | How to travel safely with your cigars | Tobacco | cigar lighters | cigar cutters | Cigars as gifts | Cigar Humidors | How to protect your cigars | Gifts for Christmas | Limited Edition cigars | Gifts for Men | Djarum | Turbo gas cigar lighter | Sticks for Walking | Wesleys Tobacconists South Africa - http://www.wesleys.co.za/siteguide.html
Good luck!