New radiator further away from wall, difficult to move pipes

[MrCheese]

I am looking to replace an old imperial sized slim rad with a new metric one. The copper pipework from the floor is set into very solid marble. The marble is in extremely large sheets and is very thick so I cannot easily move the pipework.

The new rad will be slightly less long than the old one so I can use extenders to deal with that, but what can I do about the pipework being too close to the wall? I cannot see any practical way of moving the pipe and I'm extremely reluctant to start chopping it up too much. Are there any fittings I can use to get an extra couple of cm outwards from the valve?

 

[gas112]

Depending how high off the floor the rad is. the pipework could be cut low and a small set put into the pipework
Or make the rad about 2 inches shorter or longer than the existin one and cut pipe down and have an elbow and street elbow or a couple of normal elbows (each side)which will take up the difffernce in distance