If you could get some stainless ones made up I'd be interested. I'm running a mild steel janspeed at the moment. It does the job and well happy with the high end flow, but the stainless steel looks really shabby now.
If you can't find a stainless one and have to go for mild steel I would recomend removing any paint that they have sprayed on and then spraying some VHT paint on. For some reason Janspeed use normal paint which flakes off within seconds of turning the engine on. I don't know if other manufacturers do the same.