Stock 87 Downpipe gasket question

[my85grandnation]

Im finishing up my intercooled conversion on my 85 GN and I went to hook up the downpipe and realized that the stock exhaust housing I got is missing the gasket between it and the downpipe. Im guessing this is just supposed to be a cone shaped gasket but Im not 100% sure. Does anyone know where I can get one of these from? Please let me know. Thanks Dusty

 

[Thumper]

Kirbans performance products sells that. part #7099? I think, for 22.95 comes with a few other misc gaskets also.

Thanks
Bill