I was sure I saw an adapter for under $10. Australian dollars that was 7/8 to 1 inch but can't find it now but there are stainless ones for an all up posted price a little under $20. Aus.
I just saw the one on eBay thanks ,it's not bad but may have to message the seller as the ones I looked at specify that they are stainless steel and the eBay one just said steel.
Just a warning ,these parts originally come from China so it's possible the diementions are out and the part is useless ,it just depends on the reviews on the part or the seller but at least eBay has a money back Guarantee .