Finally bit the bullet and ordered a LHS kit from Dan Cata in Romania, took around 10 days to arrive and total cost was £61, carriage seems a bit steep at $19 for a small packet but I think this is based on up to 1kg. The kit comes with new seals and bearings, so everything you need.
So this evening I got to work, took me around 2 hours, but I was being methodical, cleaning bits as I went along and generally taking my time. All relatively easy to do following the Dan Cata instructions and I also found a utube video someone else had done.
I just marked the TPS position and put it back in the same place, still need to balance the TB's properly but started her up and she is a lot quieter and seems smoother.