http://www.feelworld.cn/en/productlist.asp?sendid=41
Manufacturer state that it has some sort of peaking.
With input and output only - $229 http://www.ebay.com/itm/NEW-HD-7-LCD-Field-1080P-Camera-Monitor-SLR-HDMI-In-Out-YPrPb-Peaking-Filter-/180850977834?pt=LH_DefaultDomain_0
One with input only - $209 http://www.ebay.com/itm/7-LCD-Field-1080P-HD-Camera-Monitor-HDMI-YPrPb-Peaking-Filter-Focus-Assist-/180850973375?pt=LH_DefaultDomain_0