DT&I Spark arrestors

Does anyone know a supplier for those spark arrestors used on many (but not all) DT&I geeps? The ones with the staight pipes and then sort of a triangular head? I model the DT&I (along with the Chessie) in N-scale and would like to apply these arrestors to several of my geeps. I have seen similar products in HO scale but none in N-scale. Any ideas?

In Walthers catalog & web site — Details West part # 235 123

Detail Associates part #229 2101

Both have other types of spark arrestors also.

Walthers part # in n scale Detail Associates 229 8207 if you can find one.

Jim