I haven't seen 03-06 Mopar shafts available in quite some time. I seem to recall maybe Crown or somebody making one but I can't find it either.
I imagine your options are either Borgeson or junkyard shafts. (The only other solution I see is to convert to a Saginaw steering box (like the PSC) and use the 97-02 shaft.)
You can collapse an 03-06 shaft to fit on a 97-02 box, but you cannot extend the 97-02 shaft far enough to fit on an 03-06 OEM-style box.
I imagine your options are either Borgeson or junkyard shafts. (The only other solution I see is to convert to a Saginaw steering box (like the PSC) and use the 97-02 shaft.)
You can collapse an 03-06 shaft to fit on a 97-02 box, but you cannot extend the 97-02 shaft far enough to fit on an 03-06 OEM-style box.