hey @jb55 have you checked out
http://v3.coinos.io/ ? It uses Ark for the spending wallet and supports Ark zaps.
It also has a regular self-custodial on-chain "savings" wallet.
I'm hosting my own ASP based on the second.tech bark implementation. It also acts as a cheap lightning -> ark bridge.
It's Javascript but you could probably get your clanker to rewrite it and borrow some of the architecture.