What heavy-weight papers are there?

[darinwc]

I like the look and ease of use of RC papers, but i wish the paper base was a more heavy-wieght paper.
Is there any RC paper with a super heavy weight base?

 

[MattKing]

Ilford Portfolio papers: http://www.ilfordphoto.com/products/product.asp?n=24

They use that stock for their postcard paper as well.

 

[darinwc]

Great! Thanks!
What about non Ilford papers?