Media Managing to Prores for 5d clips on mixed timeline

Hi, I have a largish project (1TB footage) whitch is mainly SD but I have some 5d & Sony Ex footage. The majorety of the timeline is SD but there is a little 5D/Ex whitch is native footage and has to render (it is a SD timeline). Is there a way of converting the 5D/Ex clips I have used in situe (i.e. not having to convert the clip and redo cut). I know I could just convert the whole timeline into prores but this is a feature doc and would take a long time and use a lot of disk space. Also I am not ready to media manage for grading/sound edit (it is still a rough cut).

The reason I ask is I know this can be done with Avid if I consolidate.

Any ideas?

Ben