Possible Generic Banners/Labels:

Enter/Exit (In/Out) (Do Not Enter/No Entrance/Restricted Area)
Open/Closed (Open Between the Hours of __-__)
Welcome Floor Sign
Shipping/Recieving
In/Out Mail
Male/Female Bathroom
Employees Only
Handicap (Wheel Chair Accessable)
Smoking/Non
Directional Arrows
Parking (Permit/Tow/Resident/Employee/Reserved/Customer/Authorized/Visitor/Handicapped)
No Soliciting/Trespassing
Emergency Exit (Fire)


For (Rent/Sale/Lease)
Grand Opening
Going out of Buisness
Sale (%'s /Clearance)


Danger (Caution/Warning)

Suggested Sites:

http://www.creativesignage.com/   (put up samples of products in product listing)
http://www.osha.gov/pls/oshaweb/owares.do_search?p_doc_type=STANDARDS&p_logger=1&p_status=CURRENT&p_search_type=STANDTEXTPOLICY&p_search_str=Signs
http://www.usdoj.gov/crt/ada/adastd94.pdf

Suggestion: OSHA and ADA certified signage. Customer would have to comply with rules & regulations about placement, letter height and stroke along with anything else.