I was traveling around to day and came across a chap who has a metal workshop in his moums front room, anyway point is this guy still makes steel liners,
I priced him on a 74 MXA barrel and he said $350 fitted, although he needs the barrel cause he hand cuts the ports from blue staining out the barrel , so they are made to fit exactly.
Last time i was able to find a sleave they were $400 unfitted and would still need the ort matched in.
So i was impressed with what he was saying and as he is doing it he is not limited on model offerings, cast iron was the dearest others even cheaper.
Service is there if you need it chaps.