Reddit reviews 6061 Aluminum Sheet, Precision Ground, T651 Temper, Precision Tolerance, Inch, ASTM B209
We found 2 Reddit comments about 6061 Aluminum Sheet, Precision Ground, T651 Temper, Precision Tolerance, Inch, ASTM B209. Here are the top ones, ranked by their Reddit score.
6061 aluminum provides good corrosion resistance, strength, machinability, and weldabilityMeets ASTM B209 specificationsGround with high precision to the specified shape and sizeHeat treated for increased strengthPrecision tolerance
You can also order sheet metals from [Amazon] (http://www.amazon.com/Aluminum-Precision-Ground-Tolerance-Thickness/dp/B00CNLV7BK/ref=sr_1_8?s=industrial&ie=UTF8&qid=1377567087&sr=1-8) now. I used this on my LC for a while before switching back to directly printing on the heated bed. You should be able to get it in whatever dimensions you need.
Amazon sells various types of metal plates that are precision ground. Here's aluminum in various thicknesses and square sizes. Here's steel. Pieces of thick plate glass can probably be had for pretty cheap if you have a glass shop nearby. Amazon's plate glass can be kind of expensive. If you can find someone tossing out an older 35-55gal fishtank you might be able to salvage a piece of glass from either the front or the back. Don't bother with the piece that makes the bottom as that will be tempered. Newer tanks in those sizes have thinner glass but it might still be serviceable.