Try the firms advertised in W&T or MV Magazine, Witham Specialist Vehicles
and RR Motors are probably the best bet to start with.
Also I can recommend (this is not advertised):
C&C Military Vehicle Services
(Carl Marklew-Brown)
2 Main Street
Ashendon
Aylesbury
Bucks.
HP18 0HB
UK
int+44+[0]1296 658761 phone/fax
int+44+0589 127720 cellphone
If you don't have any of the UK addresses/numbers please email me
privately.
I assume you're in the States and as a general plea to all, please at least
use the two letter state abbreviation somewhere, there are quite a number
of us out here between the east and west coasts going eastwards, the
Atlantic and Pacific oceans are not wholly empty expanses of water!
Richard
(Southampton - UK)