Replying to Replacing Raichle Flexon lower buckle w FT buckle?

My lower buckle on my right boot is busted. When I go to buckle it down, it stays tight until just before it latches down, then it will slide up and become loose to the point where the buckle pulls no tension over my toe area. I can take pics if necessary.

My question is is it possible (I know it is with FTs) to take a full tilt buckle and swap it onto my flexon boot? How do I take the original broken buckle off?