Since you took over keeping the Kadur Alive, how about a version of that, but for the Kadur faith? that's a great idea isn't it? Thanks Bunches friendo for all your hard work.
Kadur is xenophobic in lore and their religion doesn't want to spread at all with the likelihood assumption of wanting their faith to be kept inside their community. This is also why the Kadur Faith despises the Luddic Faith.
Could work as them setting up an enclave, though. Basically, they ask you to set aside some land for them to do their own thing, rather than a shrine for the public.
With how much they're struggling to stay alive at all, they'd probably not be that picky unless you actively oppose them.
Not sure what boni/mali that would provide, though. Probably some growth from Kadur refugees looking for a more permanent, proper home, but no idea beyond that.