Consume asmx webservice in pcl

I am developing an app which uses third party .asmxweb service. And I am using PCL(Portable class Libraries) in my app.

So I wanted to consume those .asmx web services in my app. Problem is PCL doesn't support traditional web service viz .asmx. It supports WCF web services.

I have read many articles, they suggests me that from wsdl write WCF web service. But since all web services are third party, I need to write proxy in client app (Where web service is being called) such that it will convert WCF call to .asmx.

So do anybody have idea how to do that??