3-D drawings of the BMW 1200 GS/GSA left and right cylinder heads?

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Mornings Dawgs - can anyone assist me with where to look for 3-D drawings of the BMW 1200 GS/GSA left and right cylinder heads?

the file extension I need for Auto-cad Inventor would end...

.iges
or
.step
or
.sat
or
.xt (para-solid)

thanks

 

[Admiral D]

 

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[ahlbebuck]

 

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