Our Fancy Strap On

So Luc and I got this vibrator probably about 7 or 8 months ago and its a normal white vibrator, not bendy. Well it is now our strap on, it hurts so bad if you move wrong, or it goes in wrong, because well it doesn’t bend. On top of that we have to put in in our zipper of our pants with a shit ton of tape around it so it is even a strap on. HELLPPP!!! How can we make a strap on? I know at least one person has made their own strap on. Or how can we make this work?