You might want to try the Holmes Hobbies BR-XL. They're currently listed as out of stock, but sending an email can't hurt.

http://holmeshobbies.com/product.php?pr ... t=2&page=1

I've been running dewalts in high gear with a 6s Lipo and haven't cooked them ( ... ature=plcp )

The waterproofed versions are listed as in stock at Robot Marketplace ( http://robotcombat.com/products/0-HH-TMBRXL.html ) so that might work too.

Holmes Hobbies does sponsor me, but I wouldn't use them if they didn't work.