Forms related to Appeals from the U.S. District Court for the Northern District of Oklahoma are available on the 10th Circuit Court of Appeals website at the link shown below.  Among the forms accessible from the 10th Circuit Court of Appeals website are the Designation of Record, Docketing Statement, IFP Motions, Transcript Order Form, etc.  The same Motion to Proceed In Forma Pauperis is used for both filing a case and an appeal, and is located under the Pro Se forms.

https://www.ca10.uscourts.gov/clerk/forms