I'm not sure about lubuntu, but in Ubuntu I didn't find my exact model when first installing. I had to find a similar model and it worked perfectly. I am not sure about your particular model, but look here.
You would just go into settings and then printers and add printer. Perhaps you use Ubuntu to set it up and then switch back to Lubuntu.
Also you could just install the ppa as you saw in the comments.
https://launchpad.net/~michael-gruz/+archive/canon if it doesn't work please submit a bug, or let me know and I will.
I would just find a related model with the same features and see if it works. Most likely it would. It did for me.
Hope this helps.