Stiffest 14mm shock springs?
 

I'm running the newer 14mm Ofna Ultra LX-1 front shocks on my T-Maxx (coverted to 4-shock set up), to make it a little more fun on the race track. Before anyone give me a ton of grief about racing a T-Maxx, this is my "fun truck", and I really only race it if we need another entry to make a minimum for a class. ;) I'll be getting an SC8 or a Truggy here shortly.

Anyway, I'm currently running RC8 bronze springs on all 4 corners, but the preload rings are maxed out, and it's still a bit soft. Can someone let me know which buggy springs are stiffer than those, but will also fit the 14mm Ofna big bores? I know UE makes their "super shock" springs, but those are for the older 13mm big bores (and UE doesn't seem to be doing much work these days anyway...I can't even get to their website).

Thanks in advance for the help.