Something else to consider is getting bad bearing's rebuilt. My brother works at the Hanover, PA SKF bearing plant and they have a bearing rebuild department. They rebuild bearing's small or large, no matter the manufacturer. Rebuilt bearing's are considerably cheaper then new ones.
I also wanted to add. I have installed several Jasper engines and transmissions over the years and have alway's been happy with your products. I think your on the correct path with bearing inspection. Going from visual to ultra-sonic bearing testing is a good move for you and the customer.