Why don’t you just use a coke can for a condom, lol.
Try this if you got gall. Two battery cable style clamps with two brand new unopened decks of cards Redz Frendo Format. Best results if you pack the pump for at least 15 minutes then cable clamp the base and use two decks of cards with two battery clamps (made of plastic.. Not metal) 15 to 30 minutes - once a day then base clamp only for 6 hrs. Call it a night.