Do any of these have official D20 Modern stats?

[bhu]

http://en.wikipedia.org/wiki/Nock_gun

http://en.wikipedia.org/wiki/Punt_gun

http://www.lateralscience.co.uk/perkgun/index.html

http://en.wikipedia.org/wiki/Elisha_Collier

http://en.wikipedia.org/wiki/Volley_gun

http://en.wikipedia.org/wiki/Flintlock_mechanism#Gunlocks

http://en.wikipedia.org/wiki/Rocket_artillery

http://en.wikipedia.org/wiki/Mysorean_rockets

http://en.wikipedia.org/wiki/Congreve_rocket

http://en.wikipedia.org/wiki/Field_gun

http://en.wikipedia.org/wiki/Category:Artillery_ammunition

http://en.wikipedia.org/wiki/Fougasse_%28weapon%29

http://en.wikipedia.org/wiki/Turtle_%28submersible%29

http://en.wikipedia.org/wiki/Coach_%28carriage%29

[Keldar]

Not that I'm aware of.  They generally stuck to modern materials.