Looking for an alternative for the following component LHS out of stock

1. http://www.rcskyhobby.com/products.php?prd_id=105&main_page=products
  ( Looking for an alternative - Jugad kind of thing , a tube which is heat resistant)

2. Muffler Gasket (Can I use the Gasket sheets available in the market . Will cut them to the required shape )

bhavesh its in stock now already ordered...

i hope you you don't need one anymore