Landrover ambulance insurance help!

Hi there I am new to all this forum stuff but dont really have anywhere alese to turn.
My 19 year old son is into landrovers and we have just bought a Ex RAF Series 3 ambulance. I have looked into getting classic insurance but he has to be 21. It is £2000 to insure it with me as the proposer and him as a named driver.
Look forward to getting some help cheers.

Classic policy with footman james or the usual suspects.

hi im 19 and footman james insure me on classic policy, but make sure you tell them you want a classic policy as there normal policy's are for over 21s