Rallye dash gauge internals

[bldeagle1]

Hi, I found RT Engineering sells a modern Tach board for the Rallye instrument cluster, does anyone know where I can get internal parts for the other gauges? I only found that one and Redline Gauge Works, but not sure if they will sell components or just their services? My gauges look brand new but want to upgrade them to the latest internals where appropriate.  I've emailed to ask and waiting for a reply, but figured someone here may know?? Thanks!