Body Workout

Hello all,

Due to having a crippled back and posture I want to give weights a miss for a bit Even though my form is pretty good.
HOWEVER, I want to be able to do a body weight program with chin ups,dips, squats, press ups etc to strenghten my core and body strength. I want to be able to do muscle ups etc in the long run.

Does anyone know of anywhere to buy a machine or stand that incorporates dips, pull ups(which doesnt F up your door frame) etc without a full on weights machine?