What to do about sails to submit this idea?

I recently made a post showing off this medieval ship MOC and really appreciated all the kind words and advice there. I’m considering submitting to Lego Ideas as I think it is the most likely of any of my MOCs to do well as there are no medieval boats really on there rn and they seem to often do well. However I need advice as non-Lego parts are not allowed so I can’t include my paper sails. I don’t have any official Lego sails either to sub in. I’m not sure if brick built would look good and...