Speak to your local Regional Business Manager (RBM) at your nearest AFCO. They hold the budget purse-strings for local advertising (Regular & Reserves, so don't pay out of unit funds) and also hold all current approved advertising templates on disk for just this eventuality.
No, to be honest I haven't Harry, but all advertising is now under "jointery" & regional coherency (WTF!?). The RMR have previously received funding for poster advertising in the North region, that I'm aware of & whilst there is limited funding (isn't there always?) don't be put off.