Your search for "wooden pallet" revealed the following:

Loading cardboard (small) : YSK unpainted kit N (1:150) Part No. 469

Luggage Set (6 pieces) : Woodland Finished product set O(1:48) A2766

Luggage Set (6 pieces) : Woodland Pre-painted Finished Product N (1:160) A2216

Loading cardboard (large) : YSK Unpainted kit N (1:150) Part No. 470

Warehouse Pallets and Loads : Preiser - Painted HO (1:87) 17704

Cardboard box (loose) : YSK Unpainted kit N (1:150) Part No. 471

Lifters and pallets: Preiser, complete painted HO (1:87) 17712

Pallet Rack : Prizer Unpainted Kit HO (1:87) 17125

Cargo: Preiser unpainted kit, 1:22.5 scale, 45200

Freight Train Home with Tokyu Freight Train 3041 : Yoshiaki Nishimura HO layout section diorama work 1:80scale

Flat, square and rectangular wood 6.4 x 9.5 x 600 mm 5 pcs : Northeastern Wood Non-scale 70287

Flat, square and rectangular wood 4.0 x 4.0 x 600 mm 5 pcs : Northeastern Wood Non-scale 70246

Flat, square and rectangular wood 4.8 x 19.0 x 600 mm 5 pcs : Northeastern Wood Non-scale 70267

Flat, square and rectangular wood 4.8 x 9.5 x 600 mm 5 pcs : Northeastern Wood Non-scale 70264

Flat, square and rectangular wood 2.4 x 7.9 x 600 mm 10 pcs : Northeastern Wood Non-scale 70221

Flat, square and rectangular wood 0.8 x 4.8 x 600 mm 10 pcs : Northeastern Wood Non-scale 70128

Flat, square and rectangular wood 2.4 x 3.2 x 600 mm 10 pcs : Northeastern Wood Non-scale 70216

Flat, square and rectangular wood 7.9 x 7.9 x 600 mm 5 pcs : Northeastern Wood Non-scale 70296

Cargo set (crates, barrels, bottles, etc.): Preiser unpainted kit HO (1:87) 17100

Flat, square and rectangular wood 3.2 x 50.8 x 600 mm 5 pcs : Northeastern Wood Non-scale 70242