In the latest issue of SFX (it came out a week ago, so it's the May issue. Obviously) they're asking for what's on your wishlist for SJA series 2. You can tell them on their forum at
http://forum.sfx.co.uk where they say they have a dedicated thread for it, but I can't find it. Or you can email them at sfx@futurenet.co.uk with WISHLIST in the subject before 14th May.
Someone should really tell them there's
a big list at The Sarah Jane Smith Wardrobe Appreciation Society website