In this configuration I don't know that it is called a mule ear. Certainly not up to the level of our resident Galoots but, I am a 50:50 tailed woodworker (at least) so take pity.
If you have taken the time to align your tablesaw, cutting off a 45* piece of stock is pretty quick. I use the DP table to drill and set the threaded insert:
Assemble the parts, grab a couple pieces out of the scrap bin and test 'er out.
Close enough for me.
Why oh why did I wait so long to build a shooting board?