Changing road springs on Mk3 sport?

[911hillclimber]

My daughter has recently bought her 4th MX5, a superb Sport.
Trouble is previous owner has fitted lower springs, looks great drives great but will not clear the sleeping policemen where she works....

Question is what costs are involved in swapping the lower springs for standard sport springs?
I think I will be 'sponsoring' this change....

Thanks, and how much these days are a set of stock Mazda Sport springs?

[911hillclimber]

Thank you both.
She crawlers to the speed bumps and the underside tray or front spoiler drags on the ground.
It is an office entrance so can only be approached straight on.
Will be back about those springs once I have a labour quote and realignment from a local specialist here in the Midlands.