Joe,
I at first thought I would reline with steel if I couldn't find the CI. When I mentioned that to my engine re-builder (for the 461) he told me not to do it because steel has a different friction coefficient and would not work like CI. I haven't explored that any further so don't know how true that is but until I do I will stick with CI. If I can't find any at a decent price maybe I should explore the steel angle further.
Jack.