EW. I was going to suggest an ididt cable, which supposedly will replace the stock linkage on a TF999, but that's for a column shifter.
I would register over on CJ-8.com and ask the same question. All US CJ's had column shifters except the postal CJ-8's (like an Overlander).
That said, there are a couple of guys over there who have overlanders and several who have Postal Scramblers, so they might be able to help.
85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT
85 CJ7 258, A/C, T176, MC2100, Team Rush, Warn XD8000i, superwinch hubs, 3in lift 31" BFG AT/KO