Ok, there's only been a few players for DSLR viewfinders namely Hoodman, Zacuto, and LCDVF. Here's almost an exact replica of an LCDVF, but not sure how much effort was put into the optics. The mounting uses a metal frame, much like the original LCDVF. It looks like this fake LCDVF through some forums, say the quality is fairly nice. Now this auction is running just a bit high maybe because of recent demand, but still cheaper than the original LCDVF. This eBay LCDVF item ships from USA (free shipping), not too shabby. Apparently though this is only a copy of the original 3" LCDVF, and not the 3:2 version for the T2i / 550D. On a good day, you can find these for around $69.00 dollars which makes it the cheapest LCDVF with frame mount ever. Hopefully we'll see more of these soon. Check out the eBay LCDVF copy, sometimes less than half the price of a real LCDVF by clicking here.
Update: If you want the LCDVF 3/2 for the Canon 550D / T2i, they are now available at BHPHOTOVIDEO.com
Update: You can now buy the LCDVF 3/2 from BHPHOTOVIDEO.com.
Grab yourself the LCDVF 3/2 from BHPHOTOVIDEO.com