Their conversion sets are 3D Printed and include other materials like tube or wire, so as decals in some cases.
Most of the products are from the Late Cold War/ Modern era, with special interest on M113. The large number of countries who have used and customised the vehicle to fit different roles makes that a lot of variants can be built.
Here are a few examples, check their website for the full catalogue here , which has also figures.
M1059A1 or M1059A2 SGC with interior
YPR806A1 Dutch ARVL
LaRo Lijnwagen, Signal wire vehicle
M106A1 NL, Dutch Mortar Carrier
M806A1 3rd ARVL Canadian