Never gonna happen. The contract that Hasbro has with Fun Productions, the company that runs the Transformers collectors club and organizes Botcon, is ironclad. It says that any new molds that come out of a convention set are property of FP. And that Hasbro can never retail any of the convention exclusive characters. So if Hasbro wanted to produce a classics T-cracker/Dirge/Thrust they'd have to produce a new mold.
Like I said, Takara is the only sliver of hope for the other 3 jets using the classics SS and Ramjet molds (however slim that is). As it's happened before that a convention exclusive of one company has been released mass reatail by the other. You see Takara released the reissues of Thundercracker and Skywarp as a convention exclusives (it's why you never see TFC versions of them anywhere). While Hasbro relased them at retail.
EDIT: Here's a group shot of all 10 Botcon '07 exclusive figs, plus Vector sigma.