The New York Cosmos narrowly gained three points away to FC Edmonton thanks to a controversial goal from Eric Calvillo.
A picture-perfect curler for Vukovic, and a lethal counter-attack goal for Craig Henderson handed Indy three points.
PRFC looked primed to steal three points on the road, until Derek Gebhard's late equalizer deep in stoppage time.
MLS executives, including president and deputy commissioner Mark Abbott, will pay a visit to North Carolina FC and the Triangle area on July 19.
Justin Braun scored with a header from a corner kick to propel Indy Eleven to a 2-1 home victory over New York Cosmos.
Mauro Eustáquio stuck his leg out and buried a one-timed effort to lift FC Edmonton past North Carolina FC in the NASL.