You can send them an original, a drawing, or you can do the whole thing by email. Place the gasket in question on your flat-bed scanner and place a piece of graphpaper on top. (You can download a page of graphpaper from their website.) The scanned image will look like this:
Now email the image to http://gasketstogo.com/ at the address they provide on their website and you will receive a quote. It was less than $3 for the valve cover gasket shown above. (Silicone rubber/cork, 3mm thick)
If you accept the quote, the gaskets are made and mailed, and you pay by credit card from a PayPal invoice. From the little research I did it would appear that the service is reliable and customers are pleased with their work.
If you accept the quote, the gaskets are made and mailed, and you pay by credit card from a PayPal invoice. From the little research I did it would appear that the service is reliable and customers are pleased with their work.