I am very new to 4x5 photography, i intend to use sheet film, but currently I am in another country and would like to take pictures of family while I am here. I would love to be able to use instamatic film. How would one go about this? I have recently acquired a Toyo-view 4x5 with 4 double dark slides.

Do i need a poloroid back? I appreciate the only feasible 4x5 instamatic film would be fuji, B&W is preferable.

I'm in Newcastle upon Tyne, UK.

Thanks in advance