The turbo is pretty much a standard Garret T3. A local place that services diesel trucks would know of a local rebuilder.
Or, Google a turbocharger rebuilder like Majestic in TX. Several Lotus owners have used them.
Majestic Turbo Waco
For upgrades, no one is better than John Welch or MJM Turbo for suggestions:
MJM Turbochargers
WC Engineering : Lotus Esprit and Toyota MR2 Performance Parts
s2kseven of MJM is on our Forum.
Or, Google a turbocharger rebuilder like Majestic in TX. Several Lotus owners have used them.
Majestic Turbo Waco
For upgrades, no one is better than John Welch or MJM Turbo for suggestions:
MJM Turbochargers
WC Engineering : Lotus Esprit and Toyota MR2 Performance Parts
s2kseven of MJM is on our Forum.