For folks looking to put a dome lid on your UDS but don't want to beat the snot out of the Weber lids to make them fit or custom fab a new top ring of the drum, you can still get Kingsford lids from Masterbuilt's parts department for $19.99 + s/h.
Call 800-489-1581 and ask for a replacement lid for grill model #10040206 (Kingsford 22.5" Kettle Grill). They'll ask where and when you bought your grill. I said my roommate bought it last year at Target and that was fine.
The guy I talked to said they only have a few left in stock as the model has been discontinued so if you want one, here's your chance!
Just a Weber OTS 22.5. For now...