If there was no conversation to be had, there'd be no rumor. Given that there's a rumor, that means there's probably a conversation to be had. Given that, either Dvorak is available for pieces that aren't Rossi/Boldy/Fiala, or those three are available for Dvorak. If we take a step back and try to look at this objectively, I think we can all come to determine which of those two scenarios is more likely.
I understand Arizona fans not wanting to move him for fair value, but that's not how trades work, and there could be a variety of reasons he might be moved for less than those types of assets.
So with all that, I'd say something around Dumba and Dvorak, or something around a 1st/2nd+prospect (not named Boldy/Rossi) is what the discussion has been.