Warlord Games have released a kit of the Marder III tank destroyer.
The box claims it is a Marder III Ausf H, which is a SDKFZ 138 armed with a German 75mm PaK 40/3. Except it is a Marder III SDKFZ 139 armed with a modified Soviet 76.2mm field gun. In the descriptive text it says it is armed with the Soviet weapon.
Both were based on the Czech designed Panzer 38(t) tank.
Instruction booklet with colour photographs of painted models, data card, decals and smoke markers.
This looks like a common Panzer 38(t) chassis.
These are the components specific to the Marder III.