I used this pattern - Swannundaze Sedge Pupa - as a basis for a latex version. I did not have any Swannundaze or any access to it so I tied with a long narrow strip of latex. It worked as an exercise in fly tying very well but did not catch me any fish. I maybe did not persevere with it enough but still the fly looked very good.
Here is the pattern I used with the substitution of latex for the Swannundaze.
* Hook : 8 - 10 Shrimp or grub
* Thread : Yellow
* Underbody : Fluo red floss
* Overbody : Clear amber swannudaze
* Rib : Peacock herl
* Hackle : Brown partridge
* Wingcase : Cock pheasant
* Thorax : Brown seal's fur or similar
* Horns : Long cock pheasant tail fibres
I cant find the fly I tied, buried in a spare fly box somewhere,
but here is a site with a version of the Swannundaze Sedge Pupa.
http://www.fish4flies.com/Nymphs/Caddis ... Sedge_Pupa