Furniture Protype Needed  

I would like to know this...
I would like to know this too, in Europe and the States. Thanks.

try
try Materialise.com (rapid prototyping) in leuven (belgium); email your 3d drawings and receive 24h later your prototype...(even lacquered in the desired colour)

Furniture prototypes...not engineered STL parts
STL protoyping is for hard, hi-finished, engineered objects.
I'm looking for low-volume furniture manufacturers who like to undertake prototype sample making for designers.
The big companies only work with established designers.
Where do the rest of the creative class get there samples made?
http://www.roumeliotisdesign.com

Judging by....
your area code you must be in Montreal....so there are different choices, but with your kind of designs the place to go is Modelerie Laval 2007, Boulv St Elzear Ouest Chomedy, Laval, Quebec H7LN7 Tel: 450 680 1685. I have not been there for some months and the owner Francois Cantin was talking about moving but I am sure he is still on Laval. He can also give you some information on how to make your designs suitable for roto-moulding which seems to be your prefered technology.(a number of products shown on your website can not be done) Francois has more experience in that area than anybody else in Montreal. Good Luck!