Roll top closure, where to get plastic strip?

This is where I buy all my plastic buckles and other stuff from – http://www.backwoodsdaydreamer.com/products-page/

For the roll top, I just used the plastic from an old notebook and cut it to shape. If it's not long enough, you can overlap the ends and just tape it…since it'll be covered by fabric, it shouldn't matter.

HDPE gallon jugs are a quick and easy source of good plastic. Cut a strip vertically from the bottom to the top. A heat gun, hair dryer, or oven on 250ish, will relax the plastic, place something flat and heavy on top to straighten while it cools.

Recycling code for HDPE is "2", found on the bottom of the container btw.

;)

If you have a TAP plastics near by, they have a huge selection of plastic you can buy, including hdpe, abs, etc etc.

But as others have said, just recycle :)

Fat zip-ties from a bike shop. Lots of bikes come packed from the factory with foam padding attached to the frame with fat zip-ties. Just call a shop and ask the bike-builder to save a few long ones for you.

similar to the fat zip ties are the packing straps used on large cardboard boxes. Most are too thin but you can usually find some thicker ones.

+1 Dustin, great use of packing straps, perfect size and thickness.

Thanks guys! Ill
Keep my eye out for something than

Flexible cutting board? You can find them for cheap in stores or online, and there are varying thicknesses and sizes to tailor for your needs.

+2 Dustin

I keep an eye out for the wider ones (+ 1/2"). A great source is copy paper boxes (although many paper manufactures have begun using super thin straps and not the heavier duty ones) and a lot of appliance boxes. If you have any stores or delivery centers close by that sell and deliver appliances, they probably have a dumpster full of straps.

Take a large PET soda bottle (2 litre or thereabouts). Cut a spiral strip from the sidewall.

That's it…