You can quickly make your own outline patterns from existing assembled wood parts with just a piece of white paper and an awl. Position the paper over the piece you want to duplicate and then rub around the edges. Remove the paper and lay it over your new wood. Next, following the creases, punch small holes into the wood with the awl. For straight lines, a hole at each end is sufficient. On curves, make holes closer together. Remove the paper, draw lines between the holes, and you are ready to cut.
To deter mold, keep indoor humidity low. If possible, keep indoor humidity below 60 percent (ideally between 30 and 50 percent) relative humidity. Relative humidity can be measured with a moisture or humidity meter, a small, inexpensive ($10-$50) instrument available at many hardware stores.