Your search for "styrene" revealed the following:

Stone material R-stone river stone for ravines large dark grey : Morin material non-scale 573

Stone material R-stone river stone for ravines, small, dark grey : Morin material, non-scale 571

Flat, square and rectangular wood 0.8 x 19.0 x 600 mm 10 pcs : Northeastern Wood Non-scale 70135

Flat, square and rectangular wood 0.8 x 4.0 x 600 mm 10 pcs : Northeastern Wood Non-scale 70127

Stone material R-stone ballast 1:87 (0.9 - 1.2 mm) Main line light grey: Morin material HO(1:87) 455

House of Satsuki and Mei : Sankei Kit N (1:150) MK07-41

Sofa & Table : YSK unpainted kit N (1:150) Part No. 340

Bush F, grass type, height 15mm, light brown : Martin Uhlberg Non-scale WB-SFLB

Stone material R-stone ballast 1:87 (0.9 - 1.2 mm) Local light brown: Morin material HO(1:87) 456

Truss material 6.4 x 3.2 x 150 mm: Plastruct plastic material, non-scale 90403

Water surface creation material set for ponds : Morin material - Non-scale 603

Ferns II : Wako Material 1:35 A-28

Square nuts, bolts and washers: Grantline unpainted parts O(1:48) 16

Pharmacy : Sankei Kit N (1:150) MP03-95

Fibre-based material Medium glass (1) Natural: Molin material Non-scale MG-11

Double semicircle 0.8 x 1.6 x 609 mm, 1 piece : Northeastern Wood, non-scale 874

Flat, square and rectangular timber 1.6 x 76.2 x 600 mm, 2 pieces : Northeastern Wood, non-scale 70195

Nakashima Shoten Color Ver.: Baioudou N (1:150) Pre-Painted Kit ST-001-15C

Stone material R-stone river stone medium dark grey : Morin material non-scale 72

Powdered material: Birch leaves (dark green) : MBR material, non-scale 50-6001