I don’t think you’ll find one without fitness functions, but on all of them you can largely ignore the fitness functions.

For mapping, what functions do you need, and what’s your budget? You can get cheaper units that just show a map (and perhaps overlay a preplanned route) o’r more expensive units that do true satnav-style navigation and can re-route on the move (eg Hammerhead). Knowing your budget would make this easier.

(And with all that said, probably your best option is an old Android phone off eBay and a handlebar mount to run one of the many mapping programs)