I've cut my stock muffler open and need muffler packing material. Preferably not some cheap fiberglass wool that burns up and blows out after a few thousand km. The local muffler shops carry only pre-made stainless steel mufflers, they don't sell packing. There must be a shop in BKK or somewhere that sells high-quality motorcycle muffler packing material? I don't have a credit card here so I can't order from the 'net. Any help appreciated!