I eventually found a very helpful Lab/photo store and cleared their shelf of 120 B&W film, well all but the XP2. I could have had more the following day but had a very early morning flight to Peru the next day. 35mm films were no problem at all particularly near the Catholic University and that arcade full of photo stores catering for students etc. It's all Ilford I couldn't find Tmax at all.
Plenty of Ilford or Foma B&W papers available in Santiago, strangely the Ilford graded paper is called "Filter" but is Ilfospeed.
Ian