I would second the VDO vision gauges. Egaugesplus home page has good prices. I replaced all of them. The water temp requires you to change the sending unit to one from a VW but easy swap. The fuel unit requires you to match the OHM for the fuel sending unit. I would need to check my notes on the ohms range. If you swap to a digital speedo you need to install a speed transducer sending unit Transducer Speed Sensor. The plug on the housing is the same as the 3 wire light plug on an NAS 90. Here is a writeup as well. Fitting VDO Speed Sender
FWIW... I kept my original Speedo on the NAS90 .. purely to make sure the mileage was always 100% correct.
in NC if you have a discrepancy it will be noted on your DMV records. - Also the reason I took my electronic speedo to VDO and had them program it for the correct mileage on the 110