I have two cheap dew shields I don't use - one is a "Technotronics" brand flexable shield - which is brand new never used. 15.00 + ship.
The other was home made buy the last owner of my 9.25sct. It is one of the best dew shields I have ever used - made of a closed cell high density foam and felt lined. It's over sized and quite large - even has cut-outs top and bottom for Losmandy plates and a stop ring on the inside. Very light weight too boot! I'd keep it but it just doesn't fit my new focus/lens cap. The blue outside is a bit unconventional, but it works perfectly.
15.00 + ship