(The above are pics I found online for heat shields.) They are not homemade though they are Made in Germany aftermarket but I assume the shape is correct for whatever was factory original.
I had a factory original heat shield installed (I don't have a picture of it) under at least the center muffler when I had the factory all original brand new exhaust system installed, but what I am wondering is if I should bother to have any more heat shields installed?
The reason I had to go through all this, is that the car was with one mechanic that was 500 miles away and they ended up charging me almost nothing but also doing nothing, other than losing my entire exhaust system (was stolen when their restoration shop closed because the owners died). So then I started over with a good mechanic about 100 miles away, and had to replace the entire exhaust system (and lot else) with all factory parts that sometimes took a while to locate.
Since I had to start over with a whole new factory exhaust system, I don't know what should or was on there originally as far as heat shields.