Not sure they make the prism series anymore. Found mine on ebay. Good luck.
I think the Teleflex (Sierra) Amega series has the same curved bezel as the old Prism series, although the graphics may be different.
2000 Viper Coral 202
2013 Pro XS 200
eBay and Amazon. Just keep checking and one will show up.
Curtis Harms 1999 Cobra DC 201, 225 Mercury E.F.I.
Get the number off the side of the housing. I think the Prism part numbers are 5 digit and begin with 30xxx. That will narrow your searches down if you can include the part number. Teleflex sold their analog gauges to Veethree years ago, but they are no longer showing the Prism line. Good luck!