Have a leaky shower head. I emailed Moen looking for a small part that I couldn't find for sale anywhere. They replied with a tracking number for a whole new faucet, despite being close to 10 years old and not having any type of receipt.
Definitely not like doing business with the bike industry.
I had a similar experience with a Kohler kitchen faucet probably around the same age. I inquired about trying to replace the torn rubber around the spray head and they just mailed me an entirely new assembly.