Install on USB stick, without osmc-installer

My SD card died. Another spare one had died as well. I found yet another sd card, but it is too slow, and the system is not responsive enough. Now I want to use OSMC from an usb stick.
I don’t have a system on which I can easily install the installer. I used dd to put the image on an sd card. Without the osmc-installer, I can’t check the usb install checkbox. How can I get OSMC to install on a usb stick?

Search for preseed.cfg
A USB install is no longer recommend or required at this point in time to avoid corruption.