bed bug worries

Get someone else to sleep in your bed for an hour first!!

Tell you what should work pretty well. If you take a mosquito net of the right size you could use it as a bed cover - tuck those ends in like a hospital bed and nothing will get through that.
Also - sounds silly, but ... the material they make net curtains with ...find a fabric shop and explain the situation (watch them step backwards two paces!), they should be able to help - there is also a material specially used for pillows and duvets that doesn't allow even the smallest feather through - a roll of that would do as well.

A lot cheaper too I should think. Actually, now I think about it - when I get back home this autumn I think I will make them myself and put them up in my Ebay shop for next season.