Replacing Kawasaki engine 19 hp exmark recommendations please

[case310350]

I need to replace a kawasaki engine on my exmark mower. the model is fh601v-bs06-01. I would like to replace it with a briggs. Since this version of the Kawasaki motor don't last long I figure someone has already done this. looking for recommendations on replacements and where to buy. the small engine warehouse does not carry this motor... thanks for the help