i done the same thing when i started vaping and you can get close but never mimic that flavor or taste we was use to .But with that said some Juices that helped me make the Transition easier was
backwoods brew bacco
backwoods brew smoke
basically any BWB tobaccos are Very good The honey flue nut would also be a good choice i think for him
FSUSA Maxboro
House of vapor original reds
The dekang tobacco i found to nutty and chemically tasting for my taste though but for 8 bucks for 30ml hard to complain!