1986 caddy wings and rear arches!

Hi, i have recently bought a 1986 mk1 caddy. I am looking to replace both front wings and the rear arches! I would like to know the best place to (if i can) buy them from! I have seen front wings on ebay but im not to sure about them! I cant seem to find the rear arches though!!
Any help yould be great!
Thanks James