New Engine for S2000

[Achillles]

My Honda S2000 died on the M5 last week. Turns out there had been an oil leak and yet no warning light came on until it was too late (aforementioned M5!) having last checked it 2months ago (yes I know, I'm a muppet). Honda are quoting £9k for a complete new engine. Does anyone know of a reputable company in the south of England that will fit a new/reconditioned engine for less?

Thanks in advance.