I'm a hand quilter as well and sometimes meandering is just the way to go. I have a meander stencil that also has some tulip designs within that is great. Forget where I got it though, sorry. You've gotten great suggestions as to stencil sites. Just be careful with your marking tools (unless you already have those that work for you).
I have evolved mostly to marking as I go but that might not work so well with a meander. Good luck.