Acrow prop smaller than size 0, where to get or how to implement?

[kez1]

We have to excavate a hole in a stone wall which is approx 60cm thick so we can put a soil pipe through it.
Having removed plasterboard we see a pre-existing hole in the wall which is
1.4 m wide by 23 cm to 67 cm in height.
It's a deep hole that goes through most of the wall but not all the way to the outside.
There is no evidence of movement.

Before we disturb the wall to make our soil pipe hole we want to support the existing hole.

We need acrow props that will work in the range approx 20cm to 70cm but the smallest Acro prop is Acro prop 0 which is too large.

Looking for ideas.

 

[cdbe]

Car jack or just some hammered in timber props. But why don't you just fill in most of the hole (unless you're leaving it) then fit the pipe.

 

[^woody^]

4x2 and folding wedges

 

[scbk]

If you had scaffolding there anyway, one of the adjustable legs for that would do