While I understand the sentiment that Tampa isn't trading Tyler Johnson while things are going well, I think there are more players available than we are admitting. I do think Tampa is the last team that should be making trades, but most other teams are looking to improve.
I look at any teams 2nd or 3rd defenseman on a depth chart and if their season isn't going well, or if they think they could use a young wing or defenseman, or even draft picks, or cap relief, we have a lot to offer.
I am in the camp that we weather this storm until the deadline, as long as we are playing well enough. I think Wennberg will rebound, and Dubois is looking like he will be growing into a top 9C in the not too distant future. I am all for stocking up before the playoffs, but that could even mean just getting a 3C UFA to help with depth and matchup issues in the playoffs.
Some possible candidates if we want more than just a rental solution:
Tyler Johnson, Point, Reinhart, ROR, RNH, Strome, Strome, Domi, Galchenyuk, Marner, Nylander, Trochek, Bjugstad, Little...
And while not all of these guys are consistently playing center, or might not be considered available ... a lot can change very quickly - and if January comes around and any of those teams are sitting ten points out of a playoff spot, we will start hearing new names.