@John Bungen
I have made up two heavy paper templates for the upper and lower heat shields for any CMC Speedster. They are full size and when transferred to HVAC sheet metal (available from any local HVAC shop, often for free when you tell them what you're up to and show them the car) they fit right in, even better and more completely than the cheesy fiberglass ones that CMC once sold.
I have attached the installation instructions to this post ( engine shield instructions.doc below) so you'll know what you're in for. They are easy to fabricate, so between the instruction sheet and the notes right on the templates and with the VW engine tins in place, as well, they will completely seal off the top of the engine from the underbody.
All I ask for is a $5 dollar bill to cover mailing them to you. They're full size so they cost that much for USPS and get to you in about three days. I'll send you a PM with my address so look for that and we'll fix you up.
And BTW: I read that part about using duct tape to seal things up against the rain. Duct tape works really well, but none of us use it as a rain sealant. We all use wide ( 2" ) Blue Painter's tape (Masking Tape).
Why? Because the duct tape leaves a residue that is often hard to remove, especially if it gets cooked on there from the sun. Blue Painter's Tape doesn't leave the residue and seals up almost as well as sticky Duct Tape.
If you're trying to get the tape residue off of a metal surface, then acetone will work, but I wouldn't use it on a painted surface.
Isn't owning one of these little cars just so much FUN?