Why are you guys using a 2003 edition of MUTCD? That's outdated. The 2009 Edition with Revisions 1 and 2 (in 2012) is the most recent version. In Jan 2017 a list of known errors was published.
https://mutcd.fhwa.dot.gov/kno_2009r1r2.htm
I rarely have to mess with traffic sign related signage, but on those rare occasions I just go directly to the PDFs for the MUTCD and Standard Highway Signs. It's easy enough to grab a sign type directly out of the manuals by importing it into Adobe Illustrator. There's more than enough description to re-create those signs from scratch, provided if you have the proper FHWA Series Gothic fonts. Interim approval of Clearview Highway was recently pulled but then later reinstated (so many local and state agencies already spent a bunch of money on those fonts).