Help Identifying Shower Stem Extension

[Reicherb]

I'm trying to repair a shower that was installed by the previous home owner. I knows it's delta. I think the part is called a stem extension. Here are pictures of it. Any help would be appreciated.

 

[Reicherb]

Here are some photos of other parts that might help identify it.

Thanks.

 

[Sponsor]

 

[Reicherb]

I found it... Just not in any of the local hardware stores...
https://www.deltafaucet.com/kitchen/product/rp27527

The word kitchen in the link is misleading.

 

[Terry]

Delta with stem extensions.