Stabilimento is also defined as "factory." And, according to your description, perhaps "factory" would be a good possibility.


Here are some websites that helped me arrive at my answer:

http://www.silkscreenapparel.com/
A & R Graphics and Printing is a professional custom apparel printing andembroidery company in Anaheim with special attention to service and 100% customer satisfaction. Inside our factories only the best product comes out.
With previous work done for big names such as Verizon, Edible Arrangements, Tapout, and more! We can handle quantities of 30,000 pieces or more in a week if needed. Call for special pricing for these large quantities.

I couldn’t paste from the website below but basically, it says:
http://www.cxrgraphicsfactory.com/
This site was created by BobbyFonts for the CXR Graphics Factory


http://www.graphicsfactory.co.za/terms-of-service.php
1. The copyright to the final, accepted design in all its forms is automatically transferred to the client upon completion of the design process. Graphics Factory CC will not have the right to resell or reuse the design in any way. The only right Graphics Factory CC retains is the right to display all concept design and the final design as part of our portfolio of past work, either on the Internet or any promotional material.


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Note added at 16 mins (2010-11-09 13:22:24 GMT)
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I just noticed that you mentioned plurals:
Graphics/printing factories
Graphics factories

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Note added at 17 mins (2010-11-09 13:24:02 GMT)
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My pleasure, MisterBeppe. :-)