Need c15 air compressor help in a hurry

I am changing the air compressor (brake air supply) on my 6NZ C15. I am changing the flange spacer as well since I broke the old one trying to get it off. On the flange spacer there was an O ring type seal on either side. The dealer sold me one O ring and said there was one in the package with the "new" compressor. In the package there was a fiber gasket with a thin strip of some soft material on both sides, but no O ring. Can I use this fiber gasket instead of the O ring? or do I need and O ring on both sides of the flange?. Please help if you can. Thanks.

 

I used the gasket hoping it would seal. I feel better now knowing that a couple of people have used it without problems. Thanks.

 

The fiber gasket that came with my compressor was made to fit between the spacer and the compressor flange, and an O-ring for the engine mount surface. So far so good. I sure hope I don't have to take that bugger apart again. LOL