I am looking for a source on the east coast for 21/32 x 3/8 aluminum bar. I purchased years ago.no idea where?
821073
Most bar is going to be sold in 1/8" increments.  You will probably have to have some specially made for you.  Maybe you can just order 11/16" x3/8" and have it shaved down slightly by a machine shop.  No one is going to stock 21/32 aluminum bar.
233488
What you are looking for is called a "curb ramp" or something along that idea.  You can find them through many places that deal in RV's or boats.  Otherwise, if you can't find them locally, you can find them through Northern Tool & Equipment.  It is item# 143095.  They are a nation wide company and will ship across the US.  They can be found online at http://www.northerntool.com or you can get in touch with them by calling 1-800-221-0516.  Good luck in your seach.
500210
The local ACE hardware stores here in Atlanta carry a wide selection.  I asked for a 5 mm stainless hex head bolt, they asked if I wanted a 20mm long or 40mm.  I have not had the same luck with either Home Depot or Lowes, although Lowes does have some specialty hardware.
1016536
u might try eastbay.com.http://eastbay.com/\ntry it out. idk if its got anything youll need but it might
32512
Try Overstock.com...they might have it.
105465
Where I am at they have it at the Joann Superstores. Depending on where you are at you can check there.
661849
Go to steel supply house or local hardware
217086
Something like that is best found locally.  If it were on eBay then the shipping might be more than the cost of the cheap table.  Check the local newspaper want ads or just ask around.  Yard sales also might have one.
1090230
No matter where you live, you can get any delivered... either google a shop or online store... DC would be the be a good start if not yeah... just google it.
830590
I have had alot of luck with simplybargains.com. They have just about anything you need in the printer department. Good luck.
953739
Try a hardware store like Lowe's or Home Depot.
355865
Try a hardware store like Home Depot or Lowes.
709208
You can find international suppliers at the reference.  It appears that many materials are used including plastic and aluminum.
858738
Bound's hubby here:\n\nThis part, surprisingly, is not available from Numrich Arms.\n\nI would suggest that you contact Wolff Springs, see link below!
1097296
http://geo.craigslist.org/iso/us/va
667940
Check out the source links below. I found a few places with some.
306003
By bar I assume you mean reinforcing steel. Each size has a bend diameter. Go to the ASTM and pull up the chart. Next a hydraulic press is best to provide the action.