My understanding is that pack film contains separate negative and positive sheets folded or rolled up. They are physically separate and come together only when being pulled through the rollers, whereupon the chemical pod on the positive sheet is broken and developer is distributed between these sheets.
The problem in trying to make this, now that neither Polaroid nor Fuji no longer do, is creating these negative sheets and positive sheets with the chemical pod.
What may work is adapting the camera to accept either the "integral" film offered by Polaroid Originals (formerly The Impossible Project). These integral films are the self-developing type such as used in the SX-70 and 600-series cameras. Or: adapt the camera to work with Instax film.
The route of least effort, and not too much money, is to get one of the older 600-series Polaroid cameras (usually under $20) and buy the Polaroid Originals film for it. Or, you could choose Instax - where it's a choice between a business-card sized image and a nice camera, or a larger image and a huge camera. The film is great, though.