Find someone with a Howdens trade card, find the kitchen you want in MFI and get them to order it from Howdens, it's about half the price and they will normally deliver within a few days of ordering. They do all the appliances that MFI do too!
Surely pulling the service fuse can't be that risky?
Assuming you have switched your Fuse box/CU off then there won't be any current being drawn from that side of the feed and therefore you shouldn't get any arc'ing when removing or replacing the service fuse?
Also assuming of course that...