4. There's no such thing! Please don't skimp out on a cage. Especially if the car will see the track. Find a reputable builder, like one that does roadrace/autocross cars. If its SCCA legal even better. Then you know its done right. Figure out if you just want a bar or a full cage. They could go from $600 to $2500+ depending on what you want. Also call Kirk Racing Products. I'm 99% sure they have one for a Bug. Its peak time right now so you'll probably wait a little while for it, but they are very good and their cages are made from DOM (drawn over mandrel). Not like a drag cage thats rolled and welded tubing (eg. ERW) which are weaker. 205-608-1441 or e-mail
info@kirkracing.com They're located in Mt. Olive, Alabama, USA.