According to
http://www.mrac.org/resources/pdf/SignLanguageGuide.pdf (the
first hit in a Google search for "ASL interpreting symbol"):
"These symbols may be used in press releases, brochures, signs, forms, maps,
floorplans, advertisements and newsletters. To obtain electronically
generated copies of these and other symbols related to access, along with a
brochure that explains how to use the graphics effectively, send $12.95 plus
$3.50 shipping and handling to Graphics Arts Guild Foundation, 90 John
Street, Ste. 403, New York, NY 10038-3202. Specify a PC or MAC disk. You can
also download the symbols from their website at
www.gag.org/das."
Unfortunately, that Web page is 404, but you could copy/paste the symbol
from the PDF document. A larger (but not necessarily higher-resolution)
version appears at
http://www.ods.ohio-state.edu/services/a-s-l-interpreting-services-for-campus-events/
(the graphic itself at
http://www.ods.ohio-state.edu/posts/images/interpreter-big.jpg). There's
another version (reverse B&W) at
http://www.ehow.com/how_2311496_find-asl-interpreting-program-.html.
--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
http://word.mvps.org