v6 steve

Hi my name is Steve and iv got a E60 M sport 520 td, its the family car and the wife drives it evey day, i have 2 vauxhall calibras that i show at as many shows as i can. We have had the cracked alloys bug, had them welded but they have cracked again so im looking for a new set but all i can find are ones for a 3 series i beleve they wont fit or im i wroung? its 8j for the front and 8.5j on the rear i need i think hope someone can clear this up for me thans for any help that you can give me