You could run the Tilton elec gear oil pump. I did a little street rod, a few years back, that I ring pumped through a large tube trans cooler. That was enough to let me run 40w on the street, which really helps when your hotrod only has 1600cc! It looks like that little pump is cheaper than a couple rolls of heat wrap...which is a real testament to overpricing of simple stuff, in my opinion.
The best heat proofing you could do, perhaps, would be to strip the catalytic converter/exhaust pipe shields out of a late model small front-wheel-drive car. These are running down the center tunnel. They use a dimpled aluminum that is so thin (but stiff enough due to dimplng) that it moves the heat very fast over a lot of distance. This allows the very hot cats to live very close to the floor, without problems for the life of the car. They can even run the exhaust pipe through a relief in the fuel tank without driving tank into boil. Float the shields between the components, then lots of bolts where you feel like dumping the calories...through aluminum washers. The shapes you need are already there.
Thin aluminum and lots of area is why the fish cooks slow on the BBQ when wrapped in too big a fold of aluminum foil. If you leave part of the foil hanging out in cool air, it wont cook at all! Found out the hard way when I thought I'd be clever and make myself a big handle that wasnt in the heat....the evening got dark long before the salmon did. Add the mosquitos, and dinner in the tent was potato chips, green beans, and bottled water.....but I woke up in the night understanding why the heat shields got so long and thin.
Regards, JimL