>>1936471a long, high-rise stem with your current drop bar would be the easy, one piece solution. Sheldon Brown did this. well, you'd still need some sunrace shifters to put on the bar, I guess.
when I did what you're doing, first I tried a cheap "northroads" bar which has rise and sweep and the bends are a slight forward position. I put cruiser brakes on and took my old drop brakes and clamped the hoods with the levers popped out to the bends and wrapped them fat for more forward position.
I wanted more forward so I got pic related, a trekking style spinacci by Cinelli. they had discontinued them but I heard they are made again? they wouldn't fit inbetween the northroads bends so I got this other bar. works perfectly for me. but I kept the DT shifters.
good luck!
