With due respect to the designer of the off-center cross here, this one -- with thinner lines and a smaller cross; I made it about as high as the circle radius -- looks more like the ones I've seen used by mid-century post-Christian Universalists. Its later, and I think unintentionally ironic, adoption by Christians notwithstanding.
For Universalist Christianity, I'd suggest an anchor or heralding angel as more appropriate, but that's for later.
In the spirit of the original, I also dedicate these graphic files to the public domain.
The public domain declaration applies to the ready-to-use PNG and the better-for-making-derivative works SVG, downloadable below.
To the extent possible under law, Scott Wells has waived all copyright and related or neighboring rights to off-center-cross_thinner-10px_cross-radius_300px.png. This work is published from: United States.