Subsequent to me putting up this thread I found this (scroll down) Rocky Mountain Products, Parabolic Springs, Shackle Kits, Shock Absorber Kits
Missed it first time around - I think I just got to the third item from the top and as 101 tops were not listed there got the huffs [bigsad] and went searching elsewhere when I should have looked further.
Given I paid over $300 for a single unglazed top in Aust a couple of years back I think the RM price of about $550 AUD for a pair of fully glazed tops is quite good. Shipping will be expensive and I have asked for an estimate but I forgot to ask whether they are a tax collector on behalf of the Australian Government.
Garry

