Brian, I wonder if that term is the same as the name category of "Knoll Hole" or "Double Plateau". I don't remember coming across the term -Spion Kop. Perhaps George Bahto can tell us if CB or Raynor used them interchangeably.
It looks like you are from GB&I region by your list. In the States, if you are indeed speaking of what we call knoll holes, I can tell you there are quite a few in the region I live in, Wisconsin. Many of them were done by Bendelow and Langford. Of course the Knoll and Plateau are amongst the 22 or so formula holes of CB, Seth and Steamshovel Banks.
A stunning modern par 5 of said double plateau style is #5 Arcadia Bluffs in MIchigan. Also, Silva has done some similar work at Black Creek in Chatanooga.
Here in Wisconsin, there is #s 1par4, 3par4, 5par5, 6par4, 7par3, 8par4, 14par3, 17par4 and 18par5 at Lawsonia, (in varying degrees of knolls or plateaus) Langford. Bendelow has some knoll holes at #1par4 Hickory Hills, #s 3par 4 and 12par4 Quic Qui Oc, and #9par 4 at West Bend. One of Raynors best is #14par 4 Yeamans Hall. Heck, there must be dozens of them, if we are speaking of the same thing.
Got any links to pictures of a Spion Kop to see and compare?