Welding a Sensor Bung into an Aftermarket Header

Considering a used stainless header, 93-97 spec, for my '99. Pre-cat is not a major concern, apparently, but I believe the post-header sensor definitely needs to be there.

Thus, what experiences has anyone had in obtaining and welding-in a threaded bung to accommodate the sensor?

Thanks for meaningful input.....

Napa has them.

Get the bung, drill a hole, weld away. Pretty simple really.