Before this gets completely off track, to answer the original question: I don't think you will be able to find a shop light with a cord that long, they just don't make them that way. You'll have to use an extension cord or otherwise replace or extend the cord that comes with the light.
Yeah, just get yourself an extension cord to be able to hang the light where you need it.
They sell extension cords that are made from larger gage wire than the cheapy lamp cord versions. The better ones cost a bit more, but are worth it.
In my garage, I put 4 foot shop lights on each side of where my cars would be parked so I would have plenty of light to work on them. In order to do that, I had to put them on extension cords.
I bought 15 foot long extension cords that are made with 14 gage wire for the lights. I could have gone with the 16 gage cords, which were rated for 13 amps, but I wanted the 14 gage versions just incase I ended up not using one for the lights, and wanted to use it for a power tool or whatever.
Jim