Lowest durable material possible for FTN4/5?

Since Tax stamps are $0, I'd like to file a Form 1 to make one, but since I have no enclosure for my printer, I'm wondering what's the lowest durable material I should attempt to print in? Is PLA+ durable enough? I've read each documentation extensively and I'm seeing PA6-CF is what was tested, so I'm not sure should I just sit this one out until I can upgrade printers?