Sunroof on 2012 Jeep Liberty will not close

The sunroof on my daughter's 2012 Jeep Liberty would not close, so we took
it to the local dealership to get it repaired and they said it would cost about
$7,000 to repair ?!?  So we took it to another Jeep dealership and they said
that they could repair it for around $2,000, but the problem is that Jeep no
longer makes the small plastic piece that broke.  They did research and found
that there are only 3 of these on the "after-market" and none of those dealers
were willing to sell the part since it is no longer being manufactured.  So I
called Jeep and they said that there was just nothing they could do ?!  Now we
have to just trash a car that is only six years old because no one will make the
small plastic part they need to fix it?  This just seems crazy and I am not sure
what to do next.  Any advice would be greatly appreciated!