With all due respect I am going to have to totally disagree here, do not use spacers, ever, the risk of ruining your suspension components is not worth it. I do not think it is the stress on the ball joint I would be worried about, I could replace all the ball joints in a day now that I did the ball joint flip. I would be more worried about screwing up something on the lugs, etc. In my opinion the money you save by buying spacers instead of new rims and/or tires is not worth the piece of mind that you do not have some piece of metal between your wheels and the mounting surfaced that was never designed to be there. My advice in this one area is that some time spent saving some money towards what you really want is worth it instead of taking the cheap (and less safe/relable) way to widen your stance. No knock on you Kodiak, or your setup, I hope that your setup works safely for as long as you own the VX, I personally would never suggest it though.
Definitely look at your choices with the stock rims, I think you might find a tire that is close to what you are looking for.