There is a file that may be useful to you guys.  It will show you all first 
of month curves, what gas daily curve they are mapped to and the volatility 
curve mapping.  

If you ever have a question about your gas daily swaps and what curves to use 
take a look at this.

O:/erms/erms_adm/Financial Books (The Family)/Excel Reports/Gas_Daily Mapping 
Table.xls