Ok, serious answer ..... I can't see any one just giving you a permission - They're hard work to get.
I think it's safe to say that none of us pay to shoot. Well, not airgunners - a shotgun syndicate is different.
To get a permission requires leg work, thought and patience (and trust on both sides - after all, you are asking someone to let you loose with a loaded rifle). Where local to you may have pest problems? What time of year might those pests be most prevalent? What can you offer the land owner?
Don't get disheartened, it'll happen eventually.
Atb and, good luck with you