strap ons

I’m 16 & I’ve been dating my girlfriend for about a year & a half. Because of my age, I’m not able to buy a strap on from an actual sex shop. I’m able to buy sex toys in other stores like spencer’s, walmart, & urban outfitter, but none of them have strap ons, only vibrators & dildos. I can’t order one online because my parents would undoubtedly find it in the mail before I could. I’m still not out to my parents, only a couple friends my age. Does anyone have an idea of how to get one?