They come up on ebay infrequently. The issue with the factory type belts, is that it does not give, so you have to belt up a hands width inbetween. The long belt also goes underneath the folded top. So dont buckle up and then fold the top, you will crush them! Top down 1st, then buckle. It was not really a well thought out design. I have made a couple of convert belts, but belt work is on the back burner until I finish one of my cars. You need longer webbing and a couple of special parts. Here are some front ones item 110046854773, rear ones are about a foot longer than fronts.