Here's a Thor Mandalorian helmet of my own design, inspired by the gladiator helmet from Thor Ragnarök. Just mirror the right ear piece for the left one and the fb piece for the right side of the visor(if using the split up version) and everything should be scaled up good, though do check cause everyone's heads are different sizes.
The split up files for smaller beds are thor mando tb.stl, thor mando fb.stl. thor mando tf.stl and thor mando bb.stl.

Post a make and check out my other models