Which paper has a base similar to kentona?

Hello guys! I have recently noticed my stash of kentona is running low, some of my best prints have been made on the 12x16 stuff i have of it, i have reserved it for special prints only.

It works very well, i love how crisp the paper is, but more than that, its base. It does not feel like a traditional RC base, i heard it is a Fibre base of some description? I do not know which other papers have a similar or identical base, i do not like normal FB papers i have used, it tends to curl and i can never get it to lie flat! To save me experimenting with different papers, a paper with a base like this one would be great!

Any suggestions as to what the best substitute is?

Thanks guys!