Hole (crack) in front bumper

I think a body shop could fill that gap, maybe even without removal. Put in a glued backer piece, let that set up, fill it till slightly proud with bondo, sculpt it back down to match the profile, then paint and blend-in.

With all that, not sure you'd come out in $'s, vs replacing it. Maybe.

Today's "bumpers" are a cruel joke, btw.

 

Or price replacement of the plastic bumper at several body shops. Some aftermarket units are available, even prepainted for $200 shipped. It is not inconceivable to change it yourself. 2007 2008 2009 Toyota Prius Front Bumper Painted 1C0 Millenium Silver Metallic | eBay

 

Wouldn't really work with your case, but I really like this approach:

A bumper with moxie | PriusChat

 

I feel bad for you.....because that looks to be a part of a body panel MUCH larger than just a bumper cover.
Now you know why some folks in NYC who park on the street have ugly bars attached to both bumpers.

Check with a Toyota shop first; the an independent body shop or two.
The independents will often come in at half the dealer price.....or less.

Then there always is white duct tape.