Can you get -50mm springs?

[J-me]

I have an se tdi estate and have measured like 80mm arch gap once my merc wheels are on I assume -50 would look ok for regular use on 50%back roads been looking and all the kits say 40 for instance but my parents have just bought a Passat sport on my merit and that sits lower than mine stock, how do I get mine un sky scrapery?as it stands nownext to parents