There is a turbo kit for the KL which will bolt to the K8 but I fear there isn't the room under bonnet
http://www.probeaddiction.com/turbokit.htm
There is also a clutched supercharger kit designed for the KL in the US but it seems he has halted production atm
http://www.mrspeed.biz/SuperchargerKits.aspx
But if you do plan to boost I highly dont recommend the KL-ZE as it has mre NA power but a weaker valvetrain and 10.0:1 compression
Just for interests sake I am getting the complete replacement valvetrain from Ferrea and its setting me back just shy of $3k
If you do choose the Eunos 30x or mx3 in US there is a guy on probealk forums aka babybluemx3 who has a boosted 30x, It may pay to drop him a line