Where in Chengdu can we see Sanxingdui artifacts, besides the museum in Guanghan?

I visited Chengdu a few years ago, and a friend who plans to visit recently asked me for advice about things to see there.

One thing that looks interesting is the Sanxingdui ancient culture and its artifacts – large bronze masks that look like alien creatures, etc. There is a well-known museum called the Sanxingdui Museum near the excavation site in Guanghan, north of Chengdu city. However, Google Maps also shows a “Sanxingdui Art Museum” in the center of town, across the street from the Wuhou (Zhuge Liang) Temple. This would be convenient, but it’s difficult to find more detailed information about it online. I have been to neither museum myself.

My question: Given that my friend may not have time to make a special trip outside the city, how does the collection at the latter museum compare to that in the Sanxingdui Museum? Will it give a person interested in archeology a good picture of this ancient culture, or is it necessary to go out to Guanghan? Or perhaps there are other museums in Chengdu with good collections of Sanxingdui artifacts.