You could use a Ethernet to WiFi adapter, that's USB powered. As the scope won't know the difference between the adapter and a real Ethernet network.
I have used them for televisions and set top boxes without problems.
If the USB wireless is working, then you have a "backup" on the USB stick and on the PC.
You can get a SD card with WiFi too, and I guess the Ds1000z is smart enough to use a USB to SD card adapter.