Nice one Locky
I started looking into buying one and they don't come cheep I was quoted £300 for a reasonably sized 8"
I ended up scrounging some 4" foam (some was bein chucked out at work) and sewing up covers from the cheep plastic tarpaulins
They work fairly well if you pack all 9 together (they are only 4ft X3ft) at least Sx seems to be able to hit them 3 times out of 4 (that last flip was really to close for comfort Sx
)
Now and then Gyms sell off the old knackered ones and I know of one person who got one (I think he was well in with the Gym)
Jason