NTDWM. I was looking for a cat for my tintop and came across ebay shop "autopartswarehouse" . They stock escort mk 3/4 manual racks at 23.50 and mk5 manual racka t 29.95 + 6.95 delivery if anyone is interested - seemed a good price to me.
I don't know the difference between the various escort racks.
They have 100% rating on 1100 sales.
Hope that is useful to someone.