Small Engines (Lawn Mowers, etc.): Scotts L17.542, wiring diagram or ignition switch availability, hp motor, paper tag

Question
I recently purchased a used Scotts riding mower with a Kohler 17 hp motor, 42 in cut, says it has cruise control.  Mower Serial number paper tag is history so unless it is stamped somewhere on the frame I can't find a SN.  Diagrams from what I can find says it should be the L17.542.  It is missing the ignition switch, any idea if they are available, is so where, if not, how about a wiring diagram so I can put an universal ignition switch in its place.  Thanks for your time.

Answer
You need a # GY20074. List price 10.99.

Screw the universal crap. Universal is a secret code word that means junk.

Go to your locale Deere dealer and by the switch.

FYI... Deere is a huge  player in the power equipment industry. Because of there size their OEM parts are cheaper than the aftermarket replacements. If you don't have a local dealer go to www.ReynoldsLL.com and I can sell you one.