I can't help you with custom bags, but I think you might want to look into Stowaway saddle bags. Excellent quality, tons of pockets (and more space than they look like they have!) as well as being the most jostle free bags I have tried. They are also waterproof (not water resistant like a lot of other bags...).
I got mine here (free shipping or $5 two day shipping. Can't beat that.): Saddle Bags & Holders