From the BJCP 2015 guidelines.
"Helles in Munich tends to be lighter in all aspects than those outside the city, which can be more assertive with more body, flavor, and hop character."
The high end of the guidelines is 22 IBU. There are ones in Germany probably in the high 20s, but not the Munich ones.
We dropped off NHC entries at Fat Head's brewery near Cleveland. Was talking to a friend who said try the GoldenEye Lager, it's a Helles, though the hop rate is high. It tasted like a Franconia Helles, and he said the is where the owner/ brewer goes when in Germany.
From their website
GOLDENEYE PALE GERMAN LAGER: 5.1% ABV 28 IBU This beer is inspired by our own Brew master’s trips to Germany. Goldeneye is a traditional German Helles (meaning light) that is medium bodied, mildly sweet with a low bitterness.