Can anyone recommend: Door frame

I have a house in El Alimillo, on the edge of Puerto de Mazarron,  built about 12 years ago, and I need to replace the architrave around one door frame.I've not come across this before in my previous house in Spain, but this frame has woodworm!! It must have been in the timber before it was varnished at the factory, and has been munching for quite a time as the only thing left is the varnish!

I need to find a merchant who sells this pre-finished pine with the same profile as mine, and I would be grateful if anyone can direct me to a merchant within easy travelling distance.

Thank you