Skeg Needed for Vintage MTB Thruster

I’d like to fix up my husband’s 80s vintage MTB Thruster for him.  It’s missing one of the skegs.  SN# 2101JS

 

Any idea where I can buy one?

 

Thanks in advance for your help!

Contact Fins Unlimited, in Encinitas.     MTB was in the same building at one time.

By the 1980s MTB was in Melbourne, Florida. It's impossible to know how to replace the fin without seeing a picture. If it's a glass-on from that era it might need a fin made to match. If you're around central Florida you could take it by the MTB retail store, or even get it repaired by the guy who probably sanded it 30 years ago (Larry Pope).

I’ll post a picture later today.