Matt,
Hi.  Saw your post. I think Greg is on target with local sign companies
suggestion.  You also may want to contact your local youth department or
groups like Boys and Girls Club to see if they'd be interested in
participating in at least part of the painting.  It's great pr - tv and
everyone else comes out, especially if it's on  a slow Sat. newsday -
maybe even offer the community to come out and participate.  Your local
paint suppliers might even "underwrite" the paint for a sign during the
painting.
Linn