Reducing 1-1/8" Threaded Headset to 1" Threaded.

[alkingsmill]

Found a Headset that seemed to be perfect for the job but can't remember where i saw the bloody thing. It was around £40, silver and used needle bearings. It Just slotted into the 1 1/8" headtube and enabled you to use threaded 1" forks. Someone mentioned Chris King 'Devolution' but as far as i can see it's only threadless. Any other options i.e reducers or similar ?
Thanks.