Another good one: Custom Dress Shirts | Men's Custom Dress Shirts
They have the contrast cuffs/collars that OP is talking about too.
You don't need a custom shirtmaker overseas - Go with a company like Individualized Shirts - I'm not sure all the regions where they'll measure you for custom fit shits, and let you pick fabrics, cuff style, collar style, pockets, etc, but I know they do it out of NYC and NJ. These guys are the ones that do the custom shirts for stores like Neiman Marcus, and used to do it for Brooks Brothers' custom line. They make some really good quality, perfect fitting shirts, and when you get it direct from them, it's a hell of a lot cheaper (1/4 - 1/2 the price) than getting a custom shirt through a retail partner of theirs.They're just called dress shirts with colored body and white collar and cuffs. They're not really in right now, so you will probably have a hard time finding a decently constructed one RTW. I suppose you could have one made made (google shirtmakers in Hong Kong or London), but city people will think you are a toolbag and small town people will just be confused.
But, if you are really ballin go ahead and bring them back in.
If not, and you want to find adequate dress shirts without thinking too much: visit Brooks Brothers.