Does any know of a towing manufacturer who make a tow dolly for towing a motorcycle (on a rail system or a steel deck plate) and then still tow a car behind that? I thought Blue Ox might, but I looked at the systems available and it's not clear whether you can still tow a car behind their deck system. I'll need to tow a harley sportster (about 650 lbs) and jeep wrangler 3300 lbs..thanks for any info!!!