Where can I get windshield motor linkage clip??

If your luck is like mine you will find the one that went into hiding only after you buy another. One typical place that those type pieces go is onto the speaker magnet.
Then there is a small piece of channel along the bottom of the dash to reinforce it.
The clip may be resting above that channel left or right of the ashtray hanger.
I can send you one if you dont find the MIA clip.