Lift kit size ?

Ive got a 2007 Jimny that I’ve had for about 12 years. When I bought it it already had a suspension lift on it together with extended brake hoses, adjustable panards and caster correction front arms. 
one of the rear springs has broken and it makes sense to replace all the springs and shocks too. The question is what size springs do I buy! The measurement between the centre of the wheel and the edge of the wheel arch is 21.5 inches on the near side and 22 on the off side. It’s the near side rear spring that is broken hence the difference in heights. The car has a 2 inch body lift and the tyres are 30 9.50 15.
Could someone tell me what the height is between the centre of the wheel and the same part of the wheel arch (which has been cut as you can see) on a standard car so that I can decide what to buy?! 
When I bought the car I made a note that it was a 2.5 inch lift but not sure how true that is. On the rear I replaced the shocks a few years ago and they are plus 2 inch but with the swivel rear lower mount so probably about 3 inches! Confused or what! 

I would be guessing +3 springs.....if it has corrected front arms and not castor correction bushes
But like I say it's only a guess 
I use mk1 Honda crv rear springs all round with a coil chopped off on the rears and 1"spacer on driver front these give around 3" lift but are very soft 

Thanks for that and certainly worth considering.