[ImperialCrown]

This transmission was largely unchanged from 1997-2006. I see that piece going for ~$80 as it comes as part of the synchronizer blocker assembly. It is also on backorder showing -47 nationally.
You may be able find a used or junk trans somewhere or just add the new part to the bill. Unfortunately you will need this ring before it goes back together.

 

[MoparNorm]

You might also try Advanced Adapters. They sell these transmissions and may also sell replacement parts.
Don't expect to get by cheap, these transmissions sell for $2600 new. If you have to spend $80, that's the price of admission.
Good Luck.

 

[HuntfaceJones]

Thanks for replying. We ended up just buying the piece from the dealership. We looked for a day or two after this post and couldn't find anything. We got the transmission together now. It's a great feeling!

 

[MoparNorm]

Nice! Thanks for the follow up!