From Atelier Gargoyle's website:

We are a small establishment that is dedicated to the Lost Art of Handwriting. We love the history, the art, and the practice of handwriting. If you also find pleasure in handwriting, if you like to write letters and postcards and notes to yourself, if you take pleasure in embellishing your correspondence with sealing wax, and if you want well-made, beautiful tools and accoutrements to accomplish all this, you’ve found the right website. We reproduce antique seals, and we design new ones. We make our own flexible sealing wax in our small San Francisco studio, and we sell traditional wax made in France. We’ve very carefully selected the fountain pens we sell. We prefer pens that sit very comfortably in the hand and write easily. Most importantly, we specialize in italic nibs — the nib shape of choice for calligraphers in the western world over the past two millennia. We also offer gifts, writing and desk paraphernalia, knives, and other atavistic tools, treasures, and talismans. Please explore our Atelier.

Fine Stationery made of 100% cotton from Crane & Company.

FOUNTAIN PEN HOSPITAL was founded in 1946 by Phil Wiederlight and Al Wiederlight (the father and grandfather, respectively, of today's proprietors – Terry and Steve Wiederlight). Terry and Steve have a combined 50 years experience in all phases of vintage and modern writing instruments. Joining them in January of 1997 as Director of Operations, was Ed Fingerman who brought an additional 20+ years experience in fine writing instruments to the firm. Ed is a former President of Pen Collectors of America, a regular contributor to The Pennant, and has contribued to Pen World and numerous vintage

Pendemonium is a full time writing equipment shop owned by Sam and Frank Fiorella in Fort Madison, Iowa. Pendemonium was established in 1994 in Montclair, Virginia and moved to Fort Madison, Iowa in May 2000. We are one of just a handful of full time writing equipment dealers in the world.

We take pride in offering the very best personalized service we possibly can. Much of our business is transacted over the internet which some regard as rather impersonal, but we are determined to offer each of our customers service tailored to their needs.

Richard Binder Website

From his site:

FOUNTAIN PENS offer the writer a delightful aesthetic experience; they’re pleasing to use, and they produce a distinctive handwriting that cannot be achieved by any other means. (Read my essay about why I use fountain pens.)

In addition to careful, respectful repair and restoration, I specialize in adjusting, regrinding, and customizing nibs on all brands of pens. For instant gratification, I offer a broad selection of economical preground nibs for Pelikan pens.

As an authorized retailer for Bexley, Conway Stewart, Filcao, Pelikan, Signum, and Taccia, I have a carefully chosen selection of modern pens for sale. These are pens I’ve chosen because, as a repairer, I have confidence in their quality and reliability. Most of these pens have nibs that can be customized. If you purchase a pen and order its nib customized, I can customize the nib to your specifications and ship your pen the next business day. Nib customization begins at $30.00; please send mail to discuss your specific needs and their cost.