New Owner need grey haired advice.

We just bought our first Airstream. It's a 30" International that's been totally rebuilt in and out. Looks great but it was used as an extra bedroom and was plumbed to the sewer. It has no clear or black water tanks so that's going to be project #1 & 2.



Can anyone suggest a total replacement kit mfr. that will allow me to follow the step by step directions and install the black water tank and toilet?



Thank you for your ideas and experience.