When I go to restaurants that feature hand made tortillas, they are usually made by hand without a press.
My local market which is also my local large Hispanic grocery store (we have lots of little tiendas too) has several types of tortilla presses, in additional to metal I've seen wood and plastic too. They took it out but they used to have a working tortilla factory in the market, with windows that you could watch through the store into the tortilla section. It was automated, the tortilla version of the Krispy Kreme donut process. With the ability to get fresh tortillas right then, I decided I didn't have to make my own.
If you are sure you want to use the 8" pan, I'd probably just make a 6" tortilla but that's up to you!