I do not see any listed for OR Estate https://www.oregon.gov/DOR/programs/businesses/Pages/corp-vendors.aspx
I would simply use their fillable pdf https://www.oregon.gov/DOR/forms/FormsPubs/form-or-706_104-001_2018.pdf
https://www.oregon.gov/dor/programs/individuals/pages/estate.aspx
Good Luck
