We bought a standard household faucet off the shelf at Lowe's and so far it's fine. Our van has pex water lines, and so we used Sharkbite connectors to go from the pex line to the faucet's lines which are also some kind of plastic but of a smaller diameter. So far, it's working fine. Will it ever leak? I dunno, but we're going to get some Honeywell moisture detector alarm thingies to put under the sink and down where the water would likely wind up if the lines started leaking so we'll hear about any leaks before they get too bad.
Here's the faucet we used. We did not use the soap dispenser, no room, but the faucet is nice. The pull-down head is held in place magnetically, which is perfect for us since we didn't have room for the weight that is normally (and could also be) used to hold the faucet head in place.
https://www.lowes.com/pd/Delta-Savil...cet/1000373245