there are a lot of options out there for the 4x108 bolt pattern. you just have to know where to look. ROTAs are a good start, but try these sites as well:
-----> click on the "Focus" link on the right and it will narrow down the search for you
plug in your application and these sites will narrow it down as well. yeah, we don't have as many option as those with a more common bolt pattern, but it's not completely hopeless. it's also a helluva lot easier than trying to convert your bolt pattern or convert the wheel's bolt pattern.