Yahoo...I finally have something to post about. Went down to the farm turkey hunting last weekend and saw an old John Deere grill under the clubhouse. Had to 25++ years old. Anyway, I put the tape on it and it measured 22.5" across. My wheels started turning and I ended up bringing it home. After some good scrubbing and a coat of paint, I put he bottom of the old grill on the UDS and it fits perfectly. The top fit, but the bottom has a flange around it that actually fits it to the drum. I was even able to take the vent off the top and fit it to the bottom part of the grill. Shoot, I got to go take a picture and post it.
If you have an old rusted out John Deere grill, there is hope for it as a UDS lid.