Does anyone know where I might buy a replacement 43mm expanding Transom drain bung for my Ballistic 6.5 RIB? All the chandlerys I've tried only sell ones about 25mm diameter. I tried a Vailant one (about 40mm diameter) as it seemed to be close and I thought it might fit but it's just too small. Is 43mm a funny size or am I looking in the wrong places?
