Hi I have this Polerouter Sub with a wrong crystal. Aesthetically, it looks bad, very thin and is actually smaller than it should be. I've been looking for an original crystal with no luck, there's actually one offer to me but the price is too high for me to afford a crystal. So I'm looking to buy a best aftermarket replacement, with or without loupe would do well. Do you masters here know which particular crystal can well fitted this? This is my watch: Thank you very much! Kevin