Digital BW, The Print

I have a 2200 set-up with Septone inks.  Happy with it.  

Does anyone know of commercially available large format Septone 
printing?  I just need a few 16x20's made of a difficult images (can't 
print it very well with my 7600 and Ultrachrome inks).

Being comfortable with my personal Septone settings and workflow, I'm 
most interested in sending my files to someone who can just mimick my 
workflow and produce very comparable results.

Thanks!

~Chris
www.PetroScans.com