It must of been a fair wack as the 14" ebay fan I posted a link to was fairly heavy duty feeling, especially around the motor as it was metal.
I've attached a link illustrating....
The only bits plastic are obviously where the motor screws on to the fan shroud and the blades.
Did you break where the motor screws on to the shroud?
I was rather impressed with the quality compared to 2 x 12" Davis fan's I pulled off some time earlier. Felt much more sturdier, quiet and don't vibrate.
I also doubt a 16" will fit, depending on how it is mounted it should, on a shroud that is, radiators require shrouds to work effectively.
My 2 x 12" thermo's were fine for every day driving until I hit the a/c and was stuck in traffic on a 33+ degree day, temps quickly shot up and wouldn't come down until moving.
Removing the fans it looked as if only ~30-40% of the radiator had airflow through it via the fans.