Why is she unable to use each of these? I am assuming she has some kind of bad reaction to hormonal birth control, and is claiming a latex allergy? There are condoms available that are made of different materials, so you should be able to find one that is suitable.

She could also consider an iud. If you are not planning on having children, you could also consider a vasectomy.

I hope you have discussed what action you would take in the event of an unplanned pregnancy!

Do not try the withdrawal method. And yes there are many different kinds of condoms made out of all different kinds of materials. Do not use goat skin condoms. These can cause an array of different problems. Perhaps it's just the laytex or lurbrication she's allergic to. Perhaps ask a doctor for an allgery test.