SRT10 towing

I'm going to look at a regular cab SRT 10 this weekend. It's everything I want but the regular cabs don't have a tow hitch and aren't rated to tow. I know it's perfectly capable. Strong axle and ratio, beefy transmission, good brakes, full size truck frame ect. The quad cab version is rated for 7500 and has a receiver and wiring. On to my question. Where can I find a receiver to fit this truck? E trailer is showing all its models don't fit srt10 I tow about 5k around 5 times a year.