Packers have 6 WRs already on the roster and unless one goes to the IR, I don't feel like there is room for another (and I don't feel like cutting/releasing any of them)... so between the WRs and TEs I'd be looking at the TEs.
TEs who are both, at least 30 and on losing record teams are...
Antonio Gates (SD), Vernon Davis (SF), Benjamin Watson (NO), Marcedes Lewis (Jax) and Gary Barnidge (Cle).
~ I can't see the Chargers letting Gates go even with his age and their record.
~ Davis is reportedly on the trade block but he's got 354 yards in his last 18 games played with only 2 TDs and mostly because he's been banged up / injured and have a questionable QB.
~Watson has mainly been a blocking TE for the Saints, but having to get more involved after the Jimmy Graham trade and just had a career night with 10 catches for 127 yards and a TD (and Brees admit to missing him on another long TD when he would of scored). I'm doubting they would trade him, after stripping all of the other offensive weapons from the team, they got to keep someone to not have the fans and Drew Brees revolt.
~ Lewis has normally been a bright spot in the Jaguars losing darkness but he's been struggling the last two years and only has 6 catches this year... 5 of which came in a single game. Lewis might be done, or being used wrongly.
~ Barnidge has been a career back-up, nothing special... until at the age of 30 he FINALLY had his break out year, with the Browns and in 6 games he has 27 catches for 413 yards with very big games against the Raiders, Chargers and Ravens (all who have struggling defenses so he might be a bit overrated but still he's putting up the big numbers with the Browns) an he got 2 TDs against the Broncos (the only TDs by his team). But of the Packers players, only Cobb has more catches than him (3 more) and only Jones has more yards than him (9 more yards). I'm guessing the Browns would NOT want to trade him. Even though he's age and their record, they just signed Tramon Williams for a 3 year deal so they seem to be trying to win now some.