Check out the pattern books at Spotlight if there is one nearby. I saw some patterns recently for decorating babies rooms in both Burda and Macally's (sp) books and they were around $18.95 i think. Maybe worth while also checking out Craftumi website which is the sister site for Madeit as they have heaps of patterns and fabric.
Actually Madeit might have jungle themed cot sheets/room decor already made for a reasonable price or check out the custom made section if you end up wanting to buy them.
hth