Just got me a DE 1911G. Gun is great, only thing I can complain about is the front sight, I can't see it

I'm new to the 1911. Can I buy a front sight from say Wilson Combat and it fit ok?

I saw several sights on WC site but a bit confused on the sizes that range from .140 - .200. I assume this is the size of the dot?

If it's a lot of trouble to mess with I may just stick with a dab of white nail polish on the front post and be done with it.

Thanks,
Tex