Looking for thermocouple wires

Hi, I am new to electronics. I’m looking for thermocouple wire replacements for my project. I placed my order on Omega Engineering two months ago and have not received my order. I’m hoping to find the same products on Digi-Key.

Here’s what I am looking for:
Constantan thermocouple wire: Fine Gage, Single Strand, PFA Insulated Thermocouple Wire

Copper thermocouple wire: Fine Gage, Single Strand, PFA Insulated Thermocouple Wire

I wasn’t able to find the exact equivalent on my quick search, but I also don’t know much about how different the conductor cables listed on Digi-Key are from these thermocouple wires I am lookin for. Any help would be appreciated.

Best, Ting