Hiya, I just ordered volume 32 off Ebay. Very simple. Though admittedly not very cheap, so I'm not sure if that was the answer you were after XD;
(As for reading online, you'll have to ask someone else cause I don't know the sites for that...)
But vol. 32 is full of Commoner moments (seriously, SERIOUSLY!) so it's worth waiting for. And Dia's adorable. <3