I made a thick alloy washer with a slightly smaller diameter than the bush passed a bolt through it through the bush with a socket that the bush will fit in on the back of the frame with the bolt passing through the socket aswell. Then simply tighten the nut and it pulls the bush through the frame into the socket. Simple as that.
Fitting is the opposite, made a 10mm thick spacer 5mm larger than the bush, bolt through it all again an pull back into the frame.