I usually went to CW to look at shower or sink faucets, they have a decent selection although pricing is a bit higher than online sources. Amazon of course has them much cheaper, but I wanted to see them in person before ordering, then read the reviews to determine which to buy. For our galley faucet we installed a residential kitchen faucet from Amazon, much better than stock and sprayer flow was significantly stronger. Unfortunately, RV shower faucet quality is a fraction of residential versions, we've been pretty lucky overall only having to replace leaking shower faucets twice on various rigs over 3 decades of RVing.