HD and other big-boxes only carry the middle part of the bell curve in
their stock. If only 4-5 people a year want it, they won't have it. Try
a local glass company that specializes in commercial work like signs,
store fronts and display cases, or look online. For one partial-size
sheet, you will pay a premium- most of these places deal in OEM lots.
Out of curiosity, what are you making or repairing?
1/4 inch extruded plexiglas won't hold much weight without obvious
sagging unless it is a very short span. For shelves that will look
"straight" you probably want 1/2 inch CAST acrylic, which is also
available with a scratch resistant hardened surface.
If you really only need small pieces that you planned to cut from that
larger 3x3 foot piece, you might get REALLY lucky looking for
remnants. There is even a cast plexi now that looks just like real
glass, including the green color on the polished edges after cutting.
If you call a place like Modern Plastics and describe your project,
they may come up with something a lot better than you imagined, for a
Google 'plastic sellers' and contact those in your area for names of
affiliated small quantity resellers. I recently needed a piece of
Lexan for a router base plate and Cope Plastics, the Peoria
distributor gave me the address and phone number for Custom Plastics
in Bartonville, IL. Worked out great.
The 36" will be the hard part. Around here the stock tops out at 32" or
34 " in one dimension. You can get narrow and tall, but not larger
squares. I was looking myself, last fall, to make inside storms that I
could tape to the casing. Finally said the heck with it before it
occurred to me to do it in 2 pieces with a taped joint in the center at
the level of the where the top and bottom sash join.
These folks are great, and a 3x3 foot piece would likely be considered
a remnant and sell at a greatly reduced price. Full sheets of plastic
are usually 4x8 feet.
The reason they have remnants is that they are also fabricators.
Best bet, after you look over the website is to call and talk to them
for information on what remnants they have in the back. Yu may end up
with a 3x4 foot piece or whatever, but it will be at a very good
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