95 Suburban electric mirror

Can anyone help me out with information as to where I might be able to order some electric mirror parts? The drivers side mirror on my Suburban has been "vibrating" when driving down the road lately. I got to looking at it yesterday and the electric motor "assembly" behind the mirror that has the 2 clips that the glass snaps into were partially broken and broke all the way off when I pulled the mirror glass out of the housing. I want to know if I can just buy the motor assembly (with or without the wiring) instead of replacing the whole mirror?

Thanks for any info anyone can give me.

Rick