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Dwain at VisionMotorsports in SoCal does a cromoly stand alone cylinder. looks an awful lot like the L.A. Sleeve cylinder which is a new item for them. According to a Tech at L.A. Sleeve they've done over 100 using the new process where by the 1st 1/3rd of the cylinder is completely removed and the stand alone cylinder is pressed in. They quoted me a very reasonable price. I'm betting there are several builders using them on the west coast.