Best place to buy replacement parts

Howdy again!

As a follow-up to my previous post about needing to do some work on my dash, I've been looking around for replacement parts.

My dealer gave me specific quotes on parts, but I'm seeing them online through third-party retailers for a pretty nice discount off of what my dealer wants.

So my question is...Is there a trusted retailer that a lot of people here use? Would I be better off paying extra to have my dealer purchase the parts?

I'm going to take them all to my dealer to have them install them anyway.

Thanks!