You would not be able to get that Linn County obit from the Oregon archives in any event. They don't have newspapers. The state library has a limited selection of newspaper archives that I don't think includes the right paper for this obit. The University of Oregon is the only place that has a complete Oregon newspaper archive. You probably know all this but in case you don't.
The Linn Co. historical society is a good resource, as mentioned. The Albany city library was very helpful to me when I wanted an obit from there so that's another resource. The librarian got all into trying to find the obit I wanted, spent a lot of time and effort to find an obit that evidently did not exist.