Mole the prices of both teak and mahogany are pretty stupid at this point.... Could you post a pic of the offending area? It may be possible to do a nice scarph patch depending on the location and it would be WAY cheaper.Last checked teak was over $20 per board foot...
My 2 cents, if it was me I would re-make them out of Starboard and never worry about them again, boats are enough work as it is, keeping up with wood trim just adds to it