Portland, Oregan, USA seems to be a hotbed of custom bicycle manufacturing.
A quick Google search turns up manufacturers from Portland which include:
…to name a few.
Here is a more comprehensive list – Oregon Bicycle Constructors Association.
Map Bicycles is included in this prestigious list and they make some very beautiful bikes indeed.
Here is their Map 650B Tourer.
I will have to delve more deeply into the Portland Oregon Custom bike scene and add some more beautiful bikes from what I find there.