I have looked up a US supplier of a make of paper I use. It is a Swiss paper and I am sure there must be US manufacturers making a similar product but I just don't know who they are. 

Here is a link to a sampler pack if you want to give it a go and see if meets your needs.

http://www.bhphotovideo.com/c/product/334963-REG/Ilford_1129939_Galerie_Smooth_Inkjet_Paper.html

The papers in this pack will offer some water resistance using the type of printer you have.  It is important to use papers beginning with 'smooth' from this maker as those are the nanoporous ones. 

I also understand Kodak do a hybrid paper under the name 'Ultima' I have not tried this so can't say what the reaction to water is likely to be. 

Papers that say they are Resin/polymer coated will all suffer the same fate if exposed to moisture using your type of printer . It is because the paper is relying on moisture in the ink expanding the coating so the ink can be aborbed, the coating then closes the pores as it dries, sealing the surface.  Unfortunately any moisture can reopen the pores. 

hth

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html