Semi-unrelated, bit of history to clarify. Working on the assumption that there are 2 heights of the fronts (rears are always the same except where adjustable shocks e.g.
are used) - the lower height (right of pic) is the "design height" - this is the style as designed by Lotus/Giugiaro etc., and the type present on the prototype cars - the higher height (left of pic) is the "factory height", supposedly as a result of a legal requirement for bumper height as the car went into production. There were apparently a few different colour-coded springs used in the QA process to get the cars the same/correct height, bearing in mind that no car was ever quite the same.
Other factors will obviously play a role in the height of the front of the car, e.g. the
spring isolator, and old springs will sag over time, at varying rates depending on the metal quality. Plus as mentioned above, some cars will naturally be lower looking than others. Old "lower" springs combined with old rubber will probably be very very low.
So the
lower type is the type commonly sold these days as it matches how the car was designed (right of pic), but you presumably want a set of used "high" factory springs (left of pic), which you'll find plenty of in people's garages I would have thought if they haven't been thrown away (mine were) - ideally you want a set of low mileage ones if you want it really high, otherwise you'll get a set of sagged ones and be back to square one again.
Technically there would be a third height, which as Mike says was a trend a few years ago to buy a set of rear springs and chop a bit off of them - these would then of course make the car whatever height the owner chose - potentially really really low.