Got a reply back from Tekmos.
They have a MOQ of 100 units $30/unit. Just an FYI for anybody else interested in this particular micro.
Since I no longer have access to the source code, and can only read the micro with a programmer, that limits programming.
Tekmos specified they need the program in HEX of S19 format.
Usually, I'm just straight cloning memory ICs and run PCB layout and population, programming is out of my area of expertise. Any idea if from just reading the OEM micro I can get the program to Tekmos in the format they require?