Retro Gas Pump is an inexpensive item that can be bought from the cheap items section in Nook's Cranny. You can also find it inside the balloons.
Don't forget to check how you can customize this item. You'll have to use 1 customization kit(s)
Source notes: Available in Nook's Cranny (either upgrade tier) in the unique furniture slot
|Craftable: No||Customizable: 1||Catalog: Yes|
|Source: Nook's Cranny||Size: 1x1||HHA Series: diner|