Only reference I saw was in the brochure for that year, nothing in the owners manual. If you received all the documentation with camper might have something for the faucet and/or filter that was used. If there's a loose 1/4" line it may have had drinking water faucet. Generally the filter is tapped off cold line from main faucet, housing mounted under sink. Assume you have an extra hole on sink...
There are many companies that sell complete kits with faucet, filter & housing, necessary fittings to install- under $100. Nothing camper brand specific that would be required to add filter/faucet. If cold main is already tapped with valve one less step.
Curious why someone would remove unless you have whole house filtration.