I've got a new (second hand) rear caliper, never use the rear brake my self but needed for scrutineering, and the front right caliper needs re-bleeding. Not a big job, will get it done later today. Will look at wiring a switch up later, but will do for now.
I still hope to be, all depends on the bank balance and one or two other things. The only time I use my rear brake is when I run off track, although a mate goes through a set a season on his 250 (GP)! But he is an ex-moto cross racer.