You asked for the original autobox, its available if you look for it, but it wont work if you are 100% reliant on random mechanics to make it work - e.g. if you dont install the TCU, it will remain locked in 3rd gear when you shift to D. Sly conning mechanics will tell you - buxa laggya hai, shtartt hai, lever hilake gari chaltee hai and hold your car hostage for payment, wont care if it doesnt shift. The G100 charade is an antique car now, it was originally made as a disposable 6 year car, dont bother with purchasing "engine swap cars" - you will lose all your money and will hand the car to a scrapyard soon.
and btw what the the hell does this sentence mean.
