OK, I've been to the electronics store, They had everything I asked for except the bloody OpAmp chips. They do have the TL081's as I bought them a couple of days ago, Now they did also have the LF356's in stock but they had the 'N' type, now when I refer to the datasheet for these the 'N' type are the same voltage as the TL081's so they're no good, I asked for the LF356B as they are +-22V and I feel these would have done the job but nope, they ain't got them and they're unlikely to get them either.
So, I now have a pile of bits which I can use to build this supply WITH the mods to make it work properly but I'm stuck without the chips, I thinkI'll go have a spooch about on the net and see if I can find any!