Narrow rear bumper options for Power Wagon build

[Elmo]

I will be running the Pro-Line Narrow Ridge Line front bumper and would like to run a narrow rear bumper to keep the bumper away from the fenders in the rear. I had though of using the original Honcho frame rail plug piece that capped the frame rails on the first run of Honcho's (at least that's how I remember them being, haven't seen a stock OG Honcho in person in a long time) but I can't find anything similar on eBay available for sale right now. I would like to run a rear bumper instead of a flat piece that caps the frame rails but if that's my only option I'll go that route. Any recommendations for narrow rear bumpers that look good with the Power Wagon? I am building a MASH ambulance type rig with a styrene ambulance box, Grunt tires on 1.9" Denali wheels, and some detail painting on the bumpers to match the 1:1 reference photos. Thanks for your help guys!