Age-resistant plastic in small packs?

[kalubah]

Need age-resistant (vapor-tight) plastic for an 8m long wall, neither more nor less. Everywhere I have looked, they seem to be sold in rolls of at least 25m. Can anyone suggest where I can buy, for example, 10-meter rolls?

 

[kanis]

Go to a proper hardware store (not Byggmax, Cheapy, Jem&Fix) and "grab" someone from the staff. They usually can make some special arrangements...

I used to work at a hardware store before and sure, the plastic was usually sold on a 25-meter roll, but we also had a roll from which we could sell by the meter.