[Grammar] correct preposition after "In preparation..."

[davidhill7]

I am writing a letter which goes "In preparation *** the upcoming evaluation, we are sending for your review our complete file." Is the correct preposition "of" or "for"?

 

[MikeNewYork]

I am writing a letter which goes "In preparation *** the upcoming evaluation, we are sending for your review our complete file." Is the correct preposition "of" or "for"?

For. We prepare for things.