heat riser part

[HEADWAVE@xxxx]

Greetings, all. i am looking for a heat riser part -- cast iron fitting that 
has cracked, bolts to the left exhaust manifold, long short ram setup. 
manifold number is clear, 1847434, and i think the part number (it's less 
clear) is 1917130. this is the piece that hold tube connecting exhaust 
manifold to intake manifold as part of the heat riser system. it is not the 
piece that is part of connection direct from the header to the intake 
manifold. atlas does not have it, collector's auto supply doesn't, at least 
not on list i have.

any ideas? i can always block that one off if i need to, don't really need it 
as don't run the beast in the dead of winter.

thanks.

David Rust 
Iowa City