what and where can I get a replacement part for this front bumper piece cheap

That's beyond just a chip or crack, will take some work to bridge the gap and smooth out. If you elect to replace, it's #1 here:

Grille & Components for 2017 Toyota Prius Prime | Toyota Parts

See also this thread:

Front grill crack | PriusChat

 

Or fill and sand it. Then Plastidip it with black or a contrasting color of you choice!

 

I think you'd need to remove it to repair, likely the way to go. Start with some fiberglass mesh on the backside. Makes the PlastiDip application a lot easier too.

I think that's commendable. If enough Prime owners do that, maybe Toyota will get wind and smarten up, next iteration. If there is one.

 

Nope. Our 2010 has a bit of saggy back bumper (aka saggy butt) syndrome. I just let it be, won't be falling off any time soon.

Have you seen this? It was a guy one cul-de-sac over, and I was really impressed. Sadly, he got it professionally repair, after about 6 months.

A bumper with moxie | PriusChat

 

I like your style, sir !
Just use electrical tape for the curving parts and finish with quality masking tape around that and lots of masking paper.
Be sure to carefully peel off the tape while it's still soft. Maybe practise on some fun objects first!

No reason to 'Big Deal' plastidip.

When your allegiances change, you pressure wash it off and choice another color !!

 

How did we survive without plastic cars. "Sarcasm intended"

 

Yeah, in particular those Lexus front ends: a front ender is gonna mean a lot of dental work...

 

You mean something like this:



It'll pop right out.

 

Oh....RIGHT.
Not many folks refer to a year old (or less) car as "a daily beater".

IF.....that is a red paint smudge, a little rubbing compound followed by a bit of cleaner/wax might fix it right up.
Cost: less than $20.
Time: less than an hour.

(Edit) OH you are talking about the HOLE in the grill.
Never mind.

 

Pics?

 

I don't think there is such thing as cheap parts for this car.