Google has come up with a 3D Viewer that lets you visit the Harappa Museum and parts of the site online, https://www.google.com/culturalinstitute/u/0/asset-viewer/harappa-museum...
It is part of a new collaboration with Pakistani non-profits to bring some of the country's cultural treasures to a wider audience and well worth a visit for Indus buffs.

The full selection around Harappa is at https://www.google.com/culturalinstitute/u/0/entity/%2Fm%2F03nzx?project...