What affordable rear brake can I get with nut/bolt rather than Allen Key? I am looking for recommendations for a rear brake for a road brake. The problem is that I can see plenty of options for the newer 'Allen Key' style but not the older 'nut/bolt' style. I also want just the rear brake rather than a set, drop is 'normal' for a road bike rather than extra short/long reach.
I am not too keen on going second hand because I want a nice new brake complete with pads.
Just to clarify, I am after the second of these two types:

Thanks.
Brake calipers designed for recessed nuts on the fork crown will typically have enough exposed thread to function as an externally-nutted bolt when used through the rear brake bridge.  Get any recessed-bolt front brake and use your nutted hardware with it.