Looking for supplier of untreated, FSC certified wooden products for construction industry

We are a UK supplier of materials to construction companies. We are looking to source the following products:

- wooden profile boards: square cut, required in two sizes:

75mm x 14mm x 900mm in length

75mm x 14mm x 1200mm in length

These would be delivered loose, 900 to a standard 1200mm x 1000mm wooden pallet. The current annual requirement is 80,000 per year across the two sizes.

- wooden marking out stakes: terminated with a four way point and required in six sizes:

40mm x 40mm x 300mm

40mm x 40mm x 500mm

40mm x 40mm x 600mm

40mm x 40mm x 900mm

40mm x 40mm x 1200mm

40mm x 40mm x 1500mm

The stakes should be banded in bundles of 25 and packed onto a standard 1200mm x 1000mm pallet. The current requirement is for 450,000 per year over the six lengths.