There is a way to achieve what you want, but it's a little tricky.
- Create a document with single pages (disable Facing Pages).
- Double-click the A-master in the Pages panel.
- Right-click the A-master in the Pages panel and select Master Options for "A-Master".
- Set Number of Pages to 2 and click OK.
- Select the left page of the master with the Page Tool.
- In the Transform panel, move the page two times your bleed to the left (for example
2 * 3 mm = 6 mm
).
- In the Pages panel you can select both pages of your master and drag them down to add them to your document.
Now you have a gap in the middle of your spread like a wire-o has in real life. When you export single pages the gap makes sure that you get a bleed all the way around your page and that the image won't bleed into the opposite page.

There are some downsides to working like this as you will experience:
- The two pages of the master isn't truly recognized as a spread. For example when setting the margins InDesign doesn't offer the Inside/Outside feature as with normal spreads. You will have to set the margins on the right and left page separately.
- You probably have to make separate masters for the front and back, as InDesign doesn't automatically understand if your single pages are left or right side.
- When exporting a PDF as spreads the bleed area between the pages is visible. I sometimes make a top layer for previewing where I draw a white rectangle covering the gap. I usually also draw the punched holes and perhaps the wire to be able to take account of this in my design.
- Objects won't snap to the middle of the two pages and you can't place a guide outside pages, so you'll have to manually make sure that your images get the correct bleed size.