Are there any cheats in single-player MGS V allowing you to unlock weapons or level up your Mother Base teams?

Basically, I’ve finished the game, done all the missions (some of them 2 or 3 times), the side ops, and almost all of the replay missions that pop up later on. Even so, I’m only at R&D level 45, still really far away from meeting the R&D team requirements for a lot of weapons and items (level 60 being the highest, I think). I’d like to play around with those items, but I’m not going to just grind the missions over and over (and over) to get them. I’m not interested in playing online, so an offline-only solution or a save-game file would be fine. It seems as if the R&D requirements are calibrated for a longer game, which MGS V is rumored to have been before it was rushed out the door by Konami. So is there a file I can edit or something to either just unlock those weapons and items immediately, or a way to edit my R&D team level?