You shouldn't need to replace the rear mount, but the front mount IS the one you want to change...I had this one linked in my "tutorial", here it is again.
I got one of those but the spacing for the motor studs was off. A little bit too narrow. Perhaps, I got the wrong one. Now, I have a plastic caliper from harbor freight.
Your one of the "blessed" few to actually get your stuff from him...lol...I'm happy that you did for what it's worth...lol...Hope it all fits your frame correctly.
Those mounts cost more than some folks motors do...lol.