Broken Rear Taillight Lense (Drivers side)

Yes, the left and right headlight assemblies are available separately.
A 2009 headlight assembly goes for about $160.

I have not yet seen 2010 parts listed at internet parts sites.
You might give these folks a call and ask about 2010 parts.

Alternately, these folks are a 2004-9 Prius exclusive salvage yard and
restorer. They have an excellent reputation for service and delivery.
There may be an outside chance that they have the assembly you need.

 

I also have a cracked taillamp lens on the passenger side and it is fogging. City Toyota quoted me $261 for P/N 81551-47111 (RH taillamp assembly); still pricey but quite a discount from the list price! Make sure you check with them.

 

It sounds like from the posts that you can only get the entire tail light assembly and not just the lens cover. Is this correct?

 

Yes, sorry, but you are correct. You have to buy the entire assembly, which is sealed at the factory to prevent moisture intrusion which fogs the clear lens. Since mine has a small crack in the lens, it is fogging already after only a few days.

 

OK, lets think creatively inside the box...

You can open the tail light assembly by baking it to soften the glue
holding the lens to the... lets call it the body, and then separating the
two parts.

Then you could apply a small amount of stickum over the crack on the
inside? silicon caulk? Duco Cement? liquid modelers cement?

Bingo! Smooth outer surface, small visual discontinuity inside the lens,
no leak.

This may sound like a far-fetched idea. However, if you Google,
"Bake a headlight," you'll find the procedure is used by lots of
modders, for headlights anyway... no big deal.

What have you got to loose? Only an unusable tail light.