Hey! You want quick, or thorough? Sheesh.
Prices for 4' x 8' c 1/8" (.118) Poly-Acrylic Mirror range from $74.00 to $87.00 Nationally through either GE Polymershapes or Plaskolite Dealers.
(but sometimes lower...) Most Dealers stock this size, or can get it without a special surcharge.)
Prices for 5' x 8' c 1/8 (.118) Poly-Acrylic Mirror range from $91.00 to $106.00 Nationally through either GE Polymershapes or Plaskolite Dealers.
(but sometimes higher...) Fairly Hard to find.
Prices for 5'x 10' 1/8" (.118) <<>>Poly-Acrylic Mirror range from $110 to $120.00 Nationally through either GE Polymershapes or Plaskolite Dealers. (but sometimes higher...) Hardest to find just 'laying' about. But it's happened.
Prices for 6'x 8' 1/8" (.118) <<>>Poly-Acrylic Mirror range from $110 to $120.00 Nationally through either GE Polymershapes or Plaskolite Dealers.
(but sometimes higher...)
A Rare find indeed, and highly coveted by those wanting the largest 4:3 Light Fusion they can get........
....and I bought the only 2 - 6' x 8' ers available east of the Rockies just 30 minutes ago from a Plaskolite Dealer in Cleveland, OH, for use in a Funk-Punk Night Club in Indianapolis. I went to school & played semi-pro Soccer with the Owner. Expected Fringe benefits? Free Beer on every visit to Town!
Memphis has a big inventory of 5' x 8's @ $97.00 ea. The cost per sheet to special order & ship ANY outsized mirror is....well, it ain't cheap! Finding one of such dimensions (5'ers -up) that happens to somehow be "in-stock" locally is a stroke of fortune, almost anywhere you live. Having a "in-stock somewhere else" size palleted and shipped to you is less expensive than any special order...including shipping. The bigger the mirror, and if you can find it anywhere in stock, it will always be easiest on the wallet to have it shipped to you rather that place a Custom Order at the local Dealer. I guess that should seem obvious.
All this means is, if you want Big BIg, BIG..., be prepared to wait for a Mfg Order to get run, and ride piggyback on it for the lowest price + shipping. You must also be prepared to wait until your Local Plastic Dealer will be receiving a large order so you can avoid an additional "Pallet Charge" of approx $80.00.
Worst case: You want a 5' x 10' er and you want it NOW.
(Cost $120.00 if you wait for a similar sized run.)
Cost $220.00 if you want it run ASAP and shipped to your Dealer
Pallet Charge $80.00 (...hey! 10' x 5' Wooden Pallets don't come cheap)
Cost of shipping from there(US Ohio or NC) to "wherever your Dealer is in the US. $Approx 90.00
Total cost of the worst of the worst case: Approx: $390.00
Wait until your Dealer can conveniently fill your order? Save approx. $200.00
Me? In Memphis, I just call up and say, "Deliver me a piece of 5' x 8' to "so & so's address locally, and WHOOP there it is. $10.00 local delivery charge.
Oh yeah..., this last grasp of hope from the Dungenons of CMRA's Urban Castle: Check to see if there is a Habitat for Humanity in your area. If so, ask them if they carry 88" x 44" Wardrobe Mirrors. If they do, they can be had for under $20.00 The first true Light Fusion utilized one of dose.
For comparison and illustration only mind you, below is a shot of a 5' x 8' er mounted, masked, and ready for dressing.