Your search for "styrene" revealed the following:

Thatched roof : Plastruct plastic material 1:24 PS-117(91633)

Thatched roof: Plastruct plastic HO (1:87) PS-112 (91630)

MiraForm ĩ grey A4, thickness 1 cm (210x297x10 mm): Molin material MFG-12

[Model] Planoita Cobblestone Note: Kobaru Equivalent: Sakatsuu Material N (1:150) 3755

Fish thatching: Plastruct plastic O(1:48) PS-125(91651)

[Model] Planoita Brick Note: Kobaru equivalent: Sakatsu Material N (1:150) 3757

Spiral Staircase : Plastruct Unpainted Kit 1:24 STAS-24(90946)

Embankment parts, inclined part (2 pieces): Molin material TM-02

Spanish roof tile: Plastruct plastic 1:12 PS-123 (91639)

Spiral Staircase : Plastruct Unpainted Kit 1:100 STAS-100 (90948)

[Model] Planoita Ishiwari Pattern Note: Kobaru Equivalent: Sakatsuu Material N (1:150) 3747

Embankment parts basic part (2 pieces): Molin material TM-01

Spiral Staircase : Plastruct Unpainted Kit 1:100 STAS-102(90961)

Spiral Staircase : Plastruct Unpainted Kit 1:48 STAS-48 (90947)

[Model] Planoita Mortar Note: Kobaru Equivalent: Sakatsuu Material N (1:150) 3750

Spiral Staircase : Plastruct Unpainted Kit 1:200 STAS-200 (90949)

Stylo board B5, thickness 5mm (252x179x5mm): Moline material SB-51

Styrofoam for models, fine grain, A4 size, 3cm thick (210x297x30mm): Molin material SF-55

[Model] Planoita Concrete Expression Note: Kobaru Equivalent: Sakatsuu Material N (1:150) 3751

[Model] Planoita Blocks Note: Kobaru Equivalent: Sakatsuu Material N (1:150) 3753