No one makes the bezels anymore and if you can't find them from GLS or ebay you probably won't find a new or used one anywhere else.
Your options are to remove them and send them out to a company who specializes in creating new ones such as tecnografic.com
or CommanderSander on offshoreonly.com. Theses guys can create them in any finish you like.
There are other companies out there, but do your research. Do not send anything to marinemarks, they are a scam and you will not get your panels back
Your other option is to remove them and have someone vinyl wrap them (they have burlwood vinyl) which may be more cost effective but probably won't look as nice.