Hi, T Vick. I posted earlier but it did not seem to take. There are many species of mahogany that comes from Central America around to beyond the Philippines. There is a lot of variation in the different species and in the wood from individual trees due to difference in climate. The wood that we call luan today was called Philippine mahogany back in the 60's. This was more of a marketing tool than anything else but people liked darker woods then and the word mahogany sold a lot of doors. We have them in our 60's ranch and luan was then and still is the most common wood for interior doors. Philippine mahogany/luan does come from in and around the Philippines and the mahogany that would be used for furniture manufacturing comes from Central and South America.
The bottom line on buying doors is does the wood on the luan doors look like the wood in your house. My guess is that it does and the luan doors you buy today will be indistinguishable from your old doors.