I agree with Steve. At the risk of ruffling feathers :D , really, what's the point? If your original toolkit happens to have survived to the current day, lucky you... but otherwise?
They're of little or no practical purpose, you'll spend time emptying your wallet and tracking bits down - and then what? It sits under the boot panel out of sight. The only time anyone's going to know you've got one is if someone comes up to your and says "Lovely car, mate" and then you then make them feel slightly nervous and uncomfortable by insisting
not on taking them for a drive, but in opening up the back of your car so that you can rummage around and proudly drag out your toolkit (whereupon if they're really that fussed they'll probably highlight some item that is in fact incorrect and really spoil your day....

)
And value-wise, surely the net increase in the value of your cars is... errr... exactly whatever the going rate for a decent toolkit is? Put it another way, imagine the conversation:
"Lovely car, mate. I'd like to buy it."
"Fine the cost is <<insert large number here>>"
"Great..... But does it have a toolkit?"
"No, but if you're that fussed you can have fun putting one together for around a grand, or there's even a chap selling complete ones to save you the effort for around two grand. Tell you what, I'll knock a grand off the price then it's up to you."
"Great. Done. Pleasure doing business with you."
"And you."
...And whilst we're on the question of pursuit of originality and the 'full E-type experience', what's with all the cars parked up at Bicester with modern road atlases or - and I shudder slightly as I write this - SatNavs?? Come on now, you know who you are :D. The only thing acceptable in an E-type is a correct, period-authentic, leather-bound John Bartholomew...
PS And if you're going to go to the time and trouble of fitting a heritage tax disc, don't go and let the side down by putting it in a 'Direct Line' tax disc holder or one that displays a
website address....
[/Rant over]
8)