Hi philf and welcome to OzSTOC, the source of any and all information about your ST.

The MCL Highway Pegs are pretty well impossible to find, either new or second hand, and Alans1100's post refered to by Shillas is probably your best option if you are loking for highway blades. Gone-Cruising in QLD did make some enquiries about getting copies of the MCL blades fabricated, but the fabricators he spoke with could not replicate some of the complex curves on their machines.