I am a freak for maps myself, and have always been in search of better maps...I have the Berndtson & Berndtson map and it is good, especially for the car, but it chops a lot of santiago out of the picture!
I bought a map recently in santiago it is called:
MAPA TURISTICO. SANTIAGO REGION NORTE.....but it does offer the whole country as ell on one side....it has blow ups of S F DE MACORIS , BONAO, LA VEGO, SOSUA, PUERTO PLATA, MOCA, SAMANA, LAS TERRENAS, AND RIO SAN JUAN...PLUS THE CITY OF SANTIAGO ON ONE WHOLE SIDE OF THE MAP
covers from Ingenio Abajo on the NW to Canabacoa on the SE side of the map
it is produced by Compania de Inversiones... and they list a website
www.companiadeinversiones.com
telephone in santiago 809-583-2033
again a really really good map...dont know how it would show up on the web if it shows up at all
good luck.....bob