AUD/NZD spreads

I know cross rates are the way to go to play this. But I do currency futures. So, to that end, is there a good research place or house to find historical data on the spread between the AUD and the NZD?

 

Daily charts going back 10 years for that pair, no sign-up needed:

http://efx.tradesecuring.com/Misc/EFX.asp

 

Spreads or just cross-rate?

 

Just the price/cross-rate. Do you need the historical bid/ask spread or interest rate differential?

 

Looking for the differential between the bid/asks or even lasts of AUD/USD and NZD/USD.