You can make some for yourself.
Catnip Mosquito Repellent
2 cups catnip, washed
2 cups almond oil
Bruise catnip and pack into a clean jar. Cover with oil, put a lid on the jar and set in a cool, dark place for two weeks. Shake jar lightly every day, and push herbs under the oil to avoid mold. Strain into a clean jar, seal and refrigerate for up to 8 months. To use, rub on exposed skin. (If mosquitoes are especially ferocious, you can add other strong-smelling herbs, such as rosemary, pennyroyal, basil.)
(Source: China Bayles' Book of Days, Susan Wittig Albert)
I have yet to try this, but it is on my list of things to do!!