I had problems getting my Sachs clutch! the dealer that I used got it from Loba and was not happy with them. There products are very good but they seem to be very unreliable? In my case they just randomly extended there holiday. It was ordered on the 23rd Dec and by the 17th December it still hadn't been dispatched? I had to cancel the order in the end and ordered from another supplier, 2 days later my clutch was here! I know this was ordered over Christmas and new year period and I expected it to take a little longer but not a month.....
If I was you I think I would just go Autotech it's quite an easy job to fit if you keep things organised and if you would prefer to keep your standard pump then you could get a new one and upgrade that. It would make the job easier too as it would already be very clean. I don't think new pumps are that expensive sure I saw one for 160 the otherday so with the Autotech internals it would come out around 500....