Well, if there's a list of that shows the kanji you failed (it used to do that) you could copy and paste to a word document to print out. Not sure what that'll net you.

You could just write out the kanji you miss that day by hand. That worked wonders for me in the early days.

I'm sorry there isn't such a feature at present.

Do you have many failed kanji? If you have under 30 or so it may be worthwhile to go through the whole pile and just answer No quickly (press N, Space, N, Space, repeat...). Then you'll get the summary list. I think you can select a paging of 50 rows there. So if you have less than 50 rows, you should be able to copy and paste to a text file, or into a spreadsheet program (not all work but some will maintain the table when you paste).