I think I do the same as toblerone77. I use the HBG Airborne Infantry and Transport Plane sculpts for Paratroops and make them available to any nations I have the sculpts for. While so far only the US, Germany and Japan have unique Airborne sculpts, plus Russia also has a Transport plane, thanks to the US Supplement sets in Allied colors, I can let UK, ANZAC and France have paratroopers. For Italy, I use the FMG pieces of their BR20 Transport plane and Sub-Machine gun Infantry unit to represent paratroops.
I have made this a unit available to any nation from the beginning of the game. On my tech board, I have replaced the Paratroop tech with Heavy Tanks.
Here’s the following stats for Paratroops and Transport planes we use:
Paratroops – A 2, D 2, M 1, C 4 – Attack @ 3 on first round of an Airborne Drop. Paratroops load onto a transport plane at an Airbase and can be carried by the transport plane to a battle area within the range of the transport plane. If transport plane is hit by AA, paratroopers are lost with the transport plane. Paratroops can also be dropped behind enemy lines and take control of any empty territory that does not contain a victory city, facility or capital. Paratroops may also attack lightly defended territories behind enemy lines but if the battle goes badly, there is no retreat for the paratroops.
Transport Planes – A 0, D 0, M 6, C 9 – Transport planes movement are affected by bonuses like all other aircraft – +1 from Airbase, +1 with Long Range tech, +2 from Airbase with Long Range tech.
Transport planes have no combat value and operate much like naval transport ships. If an enemy force attacks a territory that contains transport plane(s) in addition to combat units, the transport planes are the last units to be destroyed. If an enemy force moves into a territory containing only transport planes, the transport planes are automatically destroyed.
Transport planes can transport 1 Airborne Infantry during combat move up to the limit of transport’s range as long as it can land in any friendly territory. Airborne infantry MUST be loaded at an Airbase.
During Non-Combat Move, Transport planes can transport 1 infantry unit of any type from any friendly territory to any other friendly territory.
During Non-Combat Move, Transport planes can transport 2 infantry units of any type from any friendly Airbase to any other friendly territory. To move 2 infantry, they MUST be loaded at an Airbase.