I have been in a similar situation, with my plastic gauge cluster. I paid top dollar to have it repaired and refinished. Whenever I get some free time I will be posting the writeup.
You, however do have a few options. Repairing your panel is possible, contact your local plastic fabrication facility. If you can't find one, contact
Stellar Plastics outside of Detroit Michigan. I found them on the web. Be sure to explain the situation to them, and include a few photos in your email.
Option 2 is to create your own, or follow one of our member's solutions. Randy Jobe (rjobe) created a reinforcement panel made from aluminum, and has a writeup on the site. Check the "How-to" section. We also had a member recently reupholster his, which looks pretty nice too.
Option 3 is to locate a replacement. I have seen them show up on ebay from time to time.
Before I had my dash repaired, I contacted Paramount Plastics and got the same answer. After doing my research, Paramount originally made the parts up to about 1994 or so, but Mariah purchased their own equipment to produce the dashes & plastic parts in-house. It was a brilliant plan, and Mariah did this to reduce reliance on outside sources for parts. It eliminated delays and allowed them to become one of the most self-sufficient boat manufacturers in the world. I once heard that 95% of Mariah's boat parts were made in house, with the exception of engines, outdrives, gauges, and lighting fixtures.
Some parts impossible to get
