You can buy Hi-Res PDFs of each chapter here! If you have ever wanted a closer look at the comic’s details, then you will want to get your hands on these! (Note that chapters 1-3 had about a ~100dpi lower resolution from the current chapters, so they will look a bit different.)
Each one is $2 USD and currently the payment method is through Paypal. When you go to buy, it will send you offsite to Paypal so your information is safe through SSL on their site.