Some info on Grenadier Wheels, and a list of aftermarket wheels posted by another member of the forum (sorry - don't remember who provided this list):
Hub PCD is 130 & hub threads are 6 x M14x1.5.
The offset is 55mm positive. Bore is 84mm.
Some aftermarket alloys:
RIAL Transporter 6,5 + 7,0 x 17 +57-62
ALUTEC Titan 7x17 +57
ALUTEC Titan 7,5x17 +55
AUTEC Quantro 7x17 +57
BROCK RC 31 7x17 +55
BORBET CH 7x717 +55
TOMASON TN1F 7,5x17 +60
MAK King 6 7,5x17 +55
MAK Peak 7,5x17 +55
DELTA 4x4 WP 8x17 +50
DELTA 4x4 Klassik 8x17 +50