Are opeth albums available on vinyl?

I can tell you that Metal Mayhem stock the vinyls, they've always had the whole set in stock (minus Deliverance).

However, given that this shop is in Melbourne Australia, I guess that doesn't help you much.

But yes, they are all available on vinyl. No idea where you'd look for them in the US though.
 
I saw Morningrise on vinyl once at a record store here (arizona, usa) .. but dammit all, it was rent day. it was the only time I've seriously considered living on the streets. damn these infernal priorities.