Catalytic converters, and O2 sensor recommendations?

I need to replace them for my 06 Tacoma. What websites, and brands do you guys recommend? Budget friendly.

 

https://stainlessbros-com.3dcartstores.com/Catalytic-Converter_c_84.html

 

The link goes to a page of 7 options and I can't figure out if all are options with different performance ratings or if only a few are compatible with my vehicle. 2005 Tacoma V6. Can you elaborate on this response for me, I'm a dum and I've been dealing with a P0420 error code for several months now. The cats were the first suspect on the list of causes but also the most expensive, so I went down every other rabbit hole trying to avoid the cost of replacing them. 2020 has not been kind to my bank account so spending $1,500 to replace both cats isn't very appealing.