Depends on which ofna it might be. Ofna was just a re-brander. Some of their cars were Hong-Nor. Some were Hobao. Hong-nor went OOB / was sold / most cars are no longer available (the new Redcat SCT is the old Hong Nor / Ofna Jammin SC10). If the car is a Hobao, Tower still stocks and sells...
You are going to have a lot of work with that truck. It is missing 3 drive shafts, with another possibly broken. Center diff need a top plate. Front shocks missing. Front body mount broken. I don't know what it is, but it has a AE look to it to me. for sure, it started life as a nitro...