The Vesper Steel Modular Trailer Wheel you'd looked at, part # MX59FR has a zero offset, but we do have something that will work for you.
For a similar modular trailer wheel in silver with a +0.5 offset, use the Dexstar steel mod wheel, part # AM20797. The wheel has an 8 on 6-1/2 inch bolt pattern and a 3750 lb per wheel capacity.
If you click the provided video link, my buddy Jeff will run you through the features of the wheel. view full answer...