In document http://docs.oracle.com/cd/B14099_19/bi.1012/b14048.pdf it is stated that some unicode fonts could be downloaded from Metalink:
Oracle provides two Unicode fonts for Western European, Central European, Cyrillic, Greek, Turkish, Hebrew, Arabic, Baltic, Vietnamese, Thai, Simplified Chinese, Japanese, Korean, and Traditional Chinese:
■ Albany WT fonts (proportional width) are available in Oracle Application Server 10g Release 2 (10.1.2) MRUA CD.
■ Andale Duospace WT fonts (fixed width) can be downloaded from Oracle Metalink (http://metalink.oracle.com). The ARU number is 2638552.
However Oracle support query returns only unicode font problems, nothing to download. From where could I download the above mentioned fonts?