Small Engines (Lawn Mowers, etc.): Muffler, briggs and stratton, briggs stratton

Question
Briggs & Stratton model: 287707 type 1257-E1  code 990428ze.  My muffler has blown  (again), beyond welding.  I've tried finding a replacement, but none of the ones related to the above motor are anywhere near what I need.  mine is cylnder shape, exhaust outlet pointing down. attaches to the engine with a piece that comes out and up to the cylnder.

Answer
The exhaust could have been made by or ordered by the machine manufacturer, not Briggs and Stratton.

Briggs has an accessory catelog with some mufflers.  Here is the link:

http://www4.briggsandstratton.com/miscpdfs/RNT/Accessory%20Catalog%20ms3880.pdf

Check to see if page 20 has the muffler you need.

Eric