We've recently released the British Interwar Lanchester 6 x 4 armoured car

4 different variants are available:

Mk I - Dual rear wheels, flat topped commanders cupola
Mk IA - Command version without hull machine gun
Mk II - Single rear wheels, bishops mitre shaped commanders cupola
Mk IIA - Command version without hull machine gun

6mm is £0.70
12mm from £2.30
15mm from £3.60
20mm from £6.50
28mm from £14.00

The models are available in most scales.

LINK