For whatever it's worth, wanted to share my experience on a vendor who I just ordered a replacement gauge from. A lot of older boats have VDO gauges, some rather hard to find.

I found online and spoke to someone there via telephone this morning. Ordered a replacement gauge, an additional bulb and 16 diffusers to change the light color on my dash panel full of VDO instruments.

Good service, parts in stock and should ship in a day or two out of Michigan. If you're looking for VDO stuff, try them out. Also available via 800.303.6211 M-Sat, 9AM to 5PM EDT.