Engine replacement

We have a 2007 Subaru legacy wagon that we have loved and
taken great care of for many years. Last weekend it appears
that it threw a rod and blew out the engine, there is a hole in
the top of the engine. The car is in incredible condition with
just under 235k miles and was supposed to be passed down
in a couple years. We think we want to replace the engine and
keep the car but this seems scary.... Where do you even go to
get a new engine?!? How do I find the "best/right" one?
Thanks for any help!