If you have a timber yard near you then that would be the best place to head for. They will also cut the timber to size for you, although the lengths are usually sold by the metre so you will have a lot of waste and expense.
You may be lucky though and they may have some off cuts.
Also try local hardware type shops, they sometimes sell a small selection of timber and also may have an offcut, probably not much in the way of hardwood though so good luck
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