This Friedman Brothers mirror, at 40 inches wide and 60 inches tall, would give you the same look and retails for $5000. It's for sale on eBay for $1,795.00. While still pricey, with the quality Friedman Brothers produces, and the incredible focal point it would create, it is tempting.
Here's another stunning George III mirror from de Gournay. The price is not available online, but I can imagine that it far exceeds the eBay option!