If looking at replacing a linered block liners due to damage to an existing liner then if you want to keep the block that is normally the only option.
Replacing the block with a 120E block from an old Cortina from a wreckers yard in NZ may be more economical. I build all my race engines from old Cortina 120E blocks that I collected cheap before they became scarce from wreckers in Australia
There is no difference between an L block and a normal Cortina block in terms of casting wall thickness means and tolerances apart from the "L" in the casting despite all the BS written on the Web about the superior strength and suitability for over boring of the "L" blocks and various other casting numbers compared to the most common 120E blocks. I have measured up many blocks and find no significant statistical difference.
The new Ford motorsport blocks fall into the same tolerance band but the few I have measure just have a narrower wall thickness range about the same mean thickness so all are good for 83.5 mm but none would go to 85 mm like some 120E blocks I have would.
If I had a linered block I would measure the remaining wall thickness behind the sleeve as well as the sleeve thickness before I decided to do any major work on it, as linering blocks correctly is not simple. To little wall thickness behind the sleeve can lead to the support metal behind the liner cracking and then the liner itself cracking where it is not properly support.
cheers
Rohan