I have yet to receive a stimulus mailer from Randy Kuhl, and neither has Reader Rich. Reasoning from this massive sample of two, it does raise the question of whether that mailer was targeted in some way.
To continue this line of baseless speculation using anecdotal data, I noticed that the mailer posted at Rochesterturning
was sent to someone in Victor. Victor, which is a part of Ontario County, is a good target. It's more conservative than Monroe, since it contains a mix of suburban and rural voters. If I were Kuhl, I'd want to firm up my support there.