[Hallicrafters] Chimney for 4-400

[Cal Shermerhorn VE4XQ]

A plea one more time. Anyone got a spare or know of a source for this
chimney. Since I am not certain of the Eimac number  (SK-416)? I will
give the dimensions aas follows;
Width diameter is 4 inches at the base,
Top Vent hole diameter 2 3/8 inches,
3 1/2 inches high measured from the top of vent to base.
This item used in a Hallicrafter HT-45 MK ll A, using 4-400.
Any help/replies appreciated. 73 de Cal VE4XQ since 1962