How to copy column names with commas delimiter (4240121)

How do I go able copying column names with commas delimiter. Currently, Toad 9.1 copy/paste this:
Column Name ID Data Type Null?

AUAV_AGNCY_CODE_NUMBER 1 VARCHAR2 (9 Byte) Y

AUAV_LNBUS_CODE 2 VARCHAR2 (3 Byte) Y

I want to copy/paste something like this:
AUAV_AGNCY_CODE_NUMBER,AUAV_LNBUS_CODE

In the Schema Browser, select columns to copy to clipboard and right-click. Select "Copy column names with alias to clipboard." You can specify a table alias or leave it blank to just get table names. Specifying an alias of TEST will result in TEST.COL1, TEST.COL2, TEST.COL3 to be copied to clipboard and leaving the alias blank will result in COL1, COL2, COL3 to the clipboard.