It seems coins-e has FRK listed but noone has traded it there since 2014
I thought they delisted it?
after getting on the logon page. Instead of logging on I click the view markets button and in the search box put "frk" and it pops up. Actually for LTC/FRK also, just checked.
Don't deposit any coins there. I deposited some frankocoins there months ago and I can't withdraw them. There are a few scam accusation threads where others are making similar complaints. It's a zombie exchange now that lets you deposit, but won't let you withdraw. Read these threads about coins-e.