This site/company has more nozzles than you poke a stick at.
http://spray.com/

Not sure if they can help with what you want to do but they may have run into a similar operation.


>>> On 28 Feb 09 at 12:05, in message
<463443c60902280905r5ebd7dedl8c87e4a620b60e61@mail.gmail.com>, Ricardo de
Azambuja <ricardo.azambuja@gmail.com> wrote:
> Hi!
> 
> I am trying to find some info on how to build a inkjet head, but I got
> nothing :(
> 
> My idea is make a low res (50dpi?) to print direct on the walls. I
> had seen one made of spray cans, but its just too big.
> 
> Someone know where can I find some info?
> 
> 
> Thanks!
> 
> ---------------------------------
> Ricardo de Azambuja


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