ndwgolf, many thanks. I'll be in KL in the next few days and will call on them with my films.
If anyone wants to know, no shops in Ipoh or Taiping process C41 or sell films. The last small B&W darkroom in Ipoh, which was run by an elderly Chinese photogapher more or less as a hobby, closed down about a year ago. The retail shop owners I spoke to all said nobody asks for films now and they referred me to either Penang or KL but could not provide any details.
The search continues...