Hello, any recent suggestions on a shop that can remove broken header bolts on my v6?

Spent couple days trying to use 90 degree drill and such to no avail.

I got the Pacesetter Headers short, magnaflo Cat, and Dynomax turbo Muffler from Summit. Bolts were previously broken on my headers and they did not seal up. Almost killed myself driving the car around like this with Carbon Monoxide poisoning.

I am in the Plano myself. Engine could possibly use rebuild and Rear main seal replaced. Thank for any suggestions