The Canon Digital Learning Center has posted what seems to be its final solar eclipse article installments, one entitled "The Big Day" and the other featuring a pocket field guide designed to be a handy reference for the aforementioned "big day."
Latest Solar Eclipse Articles
For a full list of CDLC solar eclipse articles, see here.
With free expedited shipping at B&H, you can still likely get a new telephoto lens in time to capture the event! And if you can't find a solar filter to fit your lens, you may want to try the DIY approach.