i saw a website called xmlgold.eu that had many of these different currencies which you could convert to each other. it cetainly had Okpay and PerfectMoney and bitcoin when i checked it.
however i never used the site myself but it looked old and i believe they have a topic on bitcointalk too, you have to search for it.
edit: the topic:
https://bitcointalk.org/index.php?topic=1415473.0thank you so much my friend but i wont a simple exchange site
i want a site for exchange between members but with high security ... in fact site produce a safe place for exchange for their members and members exchange together in site but site act like a Mediator between members for protect any fraud . for example buyer first send money to site and site keep it in safe place . after seller send money to buyer and buyer confirm it , site release money to seller .
Of course site take fee for every deal ...
i hope you understand my means . any way thanks for share your comment .