I work on product which do massive use of the pl\sql web services option of xml db (Oracle XML DB Protocol Server) . in order to cut deployment we are conspiring to use amazon RDS , but according to [RDS docs|http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Oracle.html#Oracle.Concepts] this is not supported .
I wander what are alternatives , expect from use EC2 instance ?
can APEX listener can be configure to be a proxy for xml db protocol server ? are there others options ?