for standard liners any engineering company can do it

alls it is is over bore the orginal bores for new liners to be fitted

the block is then heated up will the new liners are in liquid nitrogen

once the block is to temp then the liner kegts some silicon sealent and the liners are just hand fitted, they are then pressed into the bore to a required pressure, and any excess silicon is wiped clean,

once after this then they are machined for size of pistons and rings etc and skimmed flush to the block head

nikisl liners id imagine are the same principle except that with the nikisil liner they can take a lot of amount of boost and are very hard and strong so ive heard, the pistons do need different rings as normal rings would jsust be destroyed

prices are around £1500 for nikisil liners to be fitted then you need to get rings to suit your pistons

i dont know how long they would last though