Hotend 30mm fan shroud

Update August 8th, 2014:

The Parsiotto version wasn't working very well since the neck wasn't getting any air, so I updated it to a V2, with a better air flow. It's a little bulkier but it might do the trick.
Update July 31st, 2014:

Following MrArrow1961's requests and suggestions, I have updated the files. Now I guess they can be printed without the bridge in the middle and thermal efficiency may have been improved.

This shroud will keep air from blowing on the printed part. I have supplied two versions for the hotends I currently use: magma and parisotto. Feel free to remix to fit your needs!