Max Angle,
You said........
"there is no single engine landing checklist and the same flap setting is used"
Basically I agree with your post. However, there is a single engine approach checklist (A320) which is often overlooked. QRH 2.19 specifies that if you will level off on the approach, then the approach and landing should be completed in config 3. I don't have the QRH in front of me but I think this is what it says.
Regards,
AR