There's an 8 lug 16" trailer wheel that will probably bolt on, and possibly clear everything. Most of the trailer tire/wheel sales websites give good specifications about wheel offset, etc. I believe my 3800 did have 15" brake drums, not 16, but a 16" drop center wheel wouldn't clear the drum OD.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!