Digital BW, The Print

I am in search of a box or portfolio for my 24'x36' prints so that I might take them to 
gallerys. I don't want a soft portfolio because my prints would probably get damaged.
I have searched the internet with no luck.                                                                        
I also need suggestions for a method of wrapping my prints when people come to my 
studio and need a way to get the prints home. I would like it be a nice clean 
inexpensive package.
thank you in advance,
Raphael Sloane