Redactor rollback

Hi there

With the recent redactor issues reported (blocks & repeaters, images), a client of ours wants us to rollback to an old version of Perch (pre version 3) so they can have the old redactor back again. The issue in the blocks and repeaters they can live with for the time being but the images not being shown in the redactor (just the short code) is what they really miss.

Before rolling back everything, is there a way I can just replace the current redactor with the old one?

Many thanks.