MOD Aerials

I have an ex MOD Defender 300Tdi A2 Snatch Armoured 1996. Just fitted a radio in it after finding the 24v also has a 12v connection. Rather than fit a new aerial on the roof mine has 3 different size 'male' threaded aerial connections so would like to fit an aerial with a female thread to screw onto existing roof connectors.
Where can I get an ex MOD aerial from. Any help would be appreciated.
Tonybell

Most likely e-bay or Landy shows. Possibly military surplus shops. Also if your on Facebook join the snatch, wolf and military landy groups and ask around on there. EMLRA are worth a look too.