You can create your own texture, but it takes some Photoshop skill. I believe DAZ has templates on their site.

Other possibilities: check Free Stuff for free M3 textures. M3 is a unimesh figure, so he can also take David, Freak, V3, Steph Petite, Laura, Maddy, etc., textures. Don't laugh - some female textures look okay on males, as long as there's no makeup and the eyebrows aren't too plucked.

You could also look in at PoserPros.com. They have stuff for as cheap as $2.49, including some M3 textures. They are also having a Halloween giveaway this month. It's included gift certificates, so it's worth checking out.