The only actual parts would be the handguard and the Laylax hard base/equivalent or an aftermarket outer barrel which negates the need for the base; since the rise of the MWS (and VFCs and other things) however those parts just haven't produced.
What you'll really need is quite a few tools (fair old list honestly), and if you've no idea right now of what tools you'd need for job then I'd probably be right in thinking you won't have them - not a dig in any way just being realistic. If you're actually a plumber or already build radio controlled planes or whatever then I'll get straight back in my box.
If you can get the gun and parts to north London I'd certainly volunteer to help you do get the install done for nothing.