does anyone have a recommendation for a set of gauge cups that will fit the 52mm Marshall gauges? I like the autometer gauge cups because they can attach to the back of the tach without any extra hardware. But I'm not sure if they will fit the Marshall gauges properly. I know the Cravenspeed cups will work with the Marshall gauges, but they are so pricey.

Does anyone here have any other suggestions or experience with gauge cups for the Marshall gauges?

thanks