Take a look at a collection of 218 composite ornaments.
These can be used as base meshes for the creation of more complex elements or just kitbash them into whatever you please. Geometry consists of mostly quads with a few tris here and there.
Feel free to use these anyway you like including for commercial purposes. Please do not redistribute/resell or incorporate them in any kind of model/scene that will be sold as a stock model. Thanks.