Nit sure on the billys for the front as I have Koni's.
What year is your car? The earlier MKII's have a larger strut top hole then the later ones.
If it's the later one then you don't have too many options but here are a few from K-Mac
The K-Mac Stage 1 kit for street use is steel with ball bearings and urethane, $380 pair inc GST
Stage 2 - Street/Race - all alloy with pillow ball bearing in urethane, $480 pair inc GST
Stage 3 - Full Race - as Stage 2, but no urethane/flex, $480 pair inc GST
Cheers,
Matt