Here in the UK machine shops are using top hat liners that sit in a machined step at the top of the block,seems to work very well,saves scrapping the block.It also means the head gasket gets to seal against the top of the liner so any coolant making its way up the back of the liner can get no further.
I did a 94mm bore Rover block like this about 2 years ago,it looked "correct" when I built it and has been fine ever since.When I was researching a supplier for the liners a trade contact who builds drag engines here in the UK pointed me to a couple of places in the US.I think one of them was called Ross Pistons,they def did stepped liners so I know you can source them in the States.
The only problem is the time the car is off the road,its not a ten minute job ! (plus its not a 10 dollar fix)
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