I'm looking for fibreglass loft insulation that comes wrapped in a plastic
wrapper, to prevent the installer having to handle the fibreglass. This is
for two reasons: one is the loft is very awkward to work in, so it's hard
not to come into contact with the insulation, and the second is the cat
likes to go in there if somebody left it open, and she then licks all the
fibres off herself

The popular brand is Knauf 'Space Blanket' which is only sold in the sheds,
but nobody seems to have any stock of that (Wickes has a few rolls in random
stores but not for delivery, and at 3x the price of un-encapsulated). I
came across another brand called 'Super Loft Blanket' from a company called
U-spec of St Helens, but their distributor appears to be out of stock too
(in the 170mm thickness).

Are there any other brands or sources of this stuff?

(The alternative no-itch product is polyester fleece, but the nice thing
about Space Blanket is the wrapping is supposed to be silvered mylar film to
reduce thermal radiation - kills two birds with one stone)

Thanks
Theo