ORIGINAL: Chevelle
I think the F111 had such an ejection system.
I believe the B-1 was also designed that way.
From
http://www.aeroengineer.net/history/b1/b1_dev.html
Development of the fourth B-1 commenced on August 15, 1975, with the award of an Air Force contract amendment to Rockwell International. The aircraft will include cost reducing design refinements to the forward fuselage (ejection seats instead of the
current crew escape capsule) and engine nacelles, and redesign of the forward fuselage and aft avionics bay to accommodate defensive avionics equipment. It will be used for flight test of the B-l defensive avionics and is currently expected to fly for the first time in early 1979