The problem with Townsends is the model names change as frequently as the paint schemes on what are usually very basic high tensile steel frames. The basic bike is ultimately the same bike no matter what they call it, Townsend seldom went in for much R&D or tech inovation.
Best bet is look on ebay or gumtree for a Townsend that, paint scheme aside, looks like your old bike with the most similar spec level and chances are it will be for all intents and purposes the same bike.
Townsend have sold bikes made of reynolds 500/501/531 tubing but they are rare as hens teeth. The majority are high tensile steel such as my 1994 Beartooth which I still hold a nostagic liking for.