Scarva Tools Large Clay Extruder  £32.23

Perforated holes – 12 in total (4mm diameter)
Circular -15mm diameter
Triangular 15mm x 15mm x 15mm
Square – 15mm x 15mm
Rectangle – 30mm long x 9mm wide
Blank

8-Hollowform Die Plates Accessory Pack (Sold separately) -https://www.scarva.com/en/Scarva-Tools-8-Hollowform-Die-Plates-Accessory-Pack-For-Large-Clay-Extruder/m-10009.aspx

The die set comes complete with 8 different shapes, an insert, Allen key, and fixing bolt.
Equilateral Triangle 28mm
Square 24mm
Square 18mm
Circle 35mm
Circle 20mm
Oval 34mm x 24mm
Rectangle 29mm x 12mm
Hexagon 29mm