I wonder if the first in play you could get both Fabbro and Novak from the Preds? Both could fit in quite nicely going into next year.
I like Fabbro in terms of potential but he's pretty much bottom pairing quality right now so it would be a risk. I admittedly haven't seen much of him outside of looking at his stats though, which is low TOI but doing well in those minutes but maybe that's the "buy low" move needed. I know he's a great skater with decent overall skill. He seems very similar to Liljegren.
Novak would be a huge boost to the 3rd line and center depth. He'd be the main acquisition. He's dirt cheap this season as well, but his next contract he'll get a big raise. I have a feeling Boston will get him in some way.