Spectral DMS-10 Power Supply Light????

This is I'm sure a bit of a reach but I have a newly acquired Spectral DMC-6 pre with an outboard DMS-10 power supply.  The thin/flat light behind the name plate on the power supply has burned out and I was curious if anyone knows if a replacement is available.  If not, would another type of lamp/bulb work?

I emailed Spectral and haven't received a response.