Build it from scratch. 1st make a triangle of the parts you want. Then group the pieces together. Then duplicate the group, rotate and position accordingly. Then un-group the groups, delete the overlapping part, group all, then repeat. After you make your object, export it as a OBJ file. Then you can re-import it as a single model instead of many pieces. Using the UV editor in the vertex room, it'll be easier to assign textures to the final product. Eventually you'll get what you want, it will just take some time. :< When you do, please post your WIPs, I'd love to see how well it comes out! Hope this helps! :>