Wheel spacers?

I'm looking for wheel spacers. Does anyone know good ones for the BONOSS forged active cooling wheel spacers?
Can anyone tell me what is the difference between it and the common wheel spacers in the market？I'm not ready to buy wider tires yet. I would also like to know the pros and cons with having spacers before I buy, thanks.

I hate to be a negative Nellie, but I’m going to give you my opinion on wheel spacers. Just because they exist and some people use them, it doesn’t mean that they are a good idea. Many people have experienced cracked adapters and they don’t get noticed unless they rotate tires, or worse have a catastrophic failure. I recommended rims that have the attributes you desire.
As always it’s your car do what you wish.

I have to agree with Eg.h20. Take the route of finding a rim and tire that will get you the look. The wear and tear the spacers do especially on a car that has had some mileage is not good and the problems will start slowly but costly in the end. I been there done that.