Whiteline makes one.
I know when the stock one is worn it will make a clunking sound. Mine is ok so far but I feel this would be a nice upgrade.

Whiteline KDT909 Differential - mount front bushing

Installation instruction is in that page. How does this different than repairing the stock one because this install you have to cut the bushing on the subframe itself.

Here are one install on a lancer (review from amazon)

 

Will these fit the outlander? Look to be the same size as lancer. Around 55mm on the wings