Citadel only has one AM in Syracuse: WNSS 1260. It's an ESPN Radio affiliate. Even if Citadel strongly encouraged its own properties to take Imus, it might depend on whether ESPN would allow WNSS to "break away" from their morning drive programming to take the Imus feed. But looking at Citadel's corporate website, it appears Citadel runs ABC Radio Networks. And Disney owns ABC Television and ESPN. With all that corporate overlap, I suppose an "agreement" allowing Citadel ESPN affils like WNSS to switch to Imus wouldn't be totally out of the question. (For all I know, maybe Citadel handles the radio side of ESPN as well, but I didn't dig deep enough on their website to find it.)
If they can't (or don't want to) put Imus on WNSS, I don't see where else he would go. It's a no-brainer that Imus does not belong on 93Q or Lite 105.9. That only leaves 95X. A year or two ago, I might have said it'd be a l-o-n-g-s-h-o-t option -- given Stern's then-recent departure from radio and the suckage of B'ner & Ken. (Abbreviated his name because the board was censoring it when I wrote it out.) But now that X has Opie & Anthony, there's no way Imus could do better.
Or maybe ABC is giving first choice to stations that used to carry Imus, hoping they can just pick up where they left off. In that case, ClearChannel's WHEN could have the option before WNSS can even think about it. And WHEN would have the same hurdle, as far as permission to clear out whatever replaced Imus, in order to bring him back. Even if they got the green light (from Fox Sports Radio, I believe), would they want Imus back? Depends on how well the replacement's been doing and whether they want to risk an onslaught of complaints from Imus-haters.