I was planning on doing a Lyn costume, but I had a budget and couldn't squeeze it in. However, when I was planning to do it, I did find a pattern that you could use for Lyn. Basically, you have to modify a pattern for a Chinese-styled dress. That should work.
Cosplaying since 2004
AB '07: Hajime Ryudou (Soryuuden)
AB '08: Haseo [Second Form] (.hack//GU)
AB '09: Jazz (Eternal Sonata)
AB '10: Abel Nightroad [Artbook] (Trinity Blood)