coupe discs will fit
as i've found out, after market discs are difficult to come by, don't know about the 146 but the discs from the coupe will fit and there's a much better range available for most of the major manufacturers. they have slightly less offset (about1.5mm) than the bravo, so you need to space the back of the caliper slightly, or shave down your new pads to make them fit! they messure 287mm which is the same as some of the hgt bravos ( you didn't say which model you have) but will fit on a standard bravo (257mm disc) and should work with your standard calipers. i've been using a coupe ebc turbo groove set up with green stuff pads for about 3 months now and braking is much improved. hope this helps.