Headed out that direction shortly and will try to get some intel for this site. But not expecting much, it doesn't seem like the best option in that region.
Most of the recommendations are using tea delivery or agent services (taipeifun, sogclub, fish-spa.club, many more) but you'll need Line and some reading/writing skills (or Google Translate). The only other recommendation was mentioned by peachgolf above, Longshan Temple area but not my type of action.
I saw the OP shared an experience
https://forum.141-161.com/viewthread.php?tid=101838