Letterpress is currently booking about 2 months out.
Just make sure the face value of the stamps equals the current stamp cost
Jan E Matzeliger stamps $0.29
Valley Forge stamps $0.13
Zip Code stamps $0.10
Flags stamps $0.10
People's Right to Petition for Redress stamps $0.10
Thomas H Gallaudet stamps $0.20
Sequoyah stamps $0.19
Preserve the Environment stamps $0.10
Benjamin West stamps $0.10
Virginia Capes stamps $0.18
Yorktown stamps $0.18
Harriet Tubman stamps $0.13
Indian Head Penny stamps $0.13
Soil & Water Conservation stamps $0.20
Pan American Games Indianapolis stamps $0.22
Duke Ellington stamps $0.22
Veterans Korea stamps $0.22
Knute Rockne stamps $0.22
Jack London stamps $0.25
South Carolina stamps $0.25
Airmail stamps $0.31
Los Angeles Class stamps $0.33
Irish Immigration stamps $0.33
Carl Schurz stamps $0.04