Advice: You may be able to get one quickly, but most of them have a learning curve.
If you just want to pee standing up and be able to do it quickly and confidently, I'd suggest making your own. Coffee can lid or medicine spoons work. Tranzwear or FTM Essentials are good places if you want to buy one. I think you may be able to upgrade the shipping to make it faster as well. But again, learning curve. So you'd have to get it to you with enough time to learn how to use it.