emgo speedos

Looking for a quick and easy replacement for speedo while I try to locate a suitable green dot replacement or go electronic. Have seen the EMGO smith replicas on ebay and already have one of the tachs I bought for another project and didn't need. Has anyone put one of the EMGO speedo's in an alloy mounting cup. Looks like there is a trip reset that might be in the way. Wouldn't bother me to not have trip mileage.

I just put these on mine.
Jerry Doe inspired me to get these. I just love em'.

digital-speedo-and-tacho-t19146.html?hilit=speedo

Thanks for the link, will probably go that route on down the road but not there yet. Was wondering if the generic smiths black face gauge by EMGO, (not the Indian knock offs) can be made to fit the alloy cup.