https://zilvia.net/f/showthread.php?t=267957
I'd imagine the 3.133 in the Elgrand is the same - there's plenty of them available in the UK.
The rest of the thread has more information - it's a bit of a mish mash and certainly not as straight forward as the first post makes out
white '94 s13 200sx scrapped - mapped to 1.45bar. OS giken box, garrett GT2876R, 950cc injectors, ORC twin plate, nistune. 349bhp/325lbft @ 1.3bar CA18DET
white '96 s13 180sx - type g with more kouki bits - RB25DET, GTR steel twin turbo conversion, RB26 crank & rods. 2.6L VVT twin turbo, SR20 OSG box, OSG STR twin plate clutch, Z32 ECU w/ nistune.
current status: 180 a bit broken but to be repaired.