I just did this myself about 2 weeks ago on my '95. It was easier than you think. I got the coupler from ZZ Performance
for the listed price.I have never dug that deep into an engine before and it only took me less than 8 hours, and I did other gaskets and cleaning while I was in there.
Also, another way to test your coupler is to pull the belt off of the SC and see if you can feel any play between the nose drive and the gears. If there is it will be obvious.