LeatherZ has released a relatively affordable
gauge cluster kit for the E9x 3-series cars, including the E93 convertibles. The kit allows for 3 gauges to fit in place of where the ashtray currently is in the center console. Pricing is about 10-20% lower than other custom solutions I've seen and the cluster kit is configurable running from $305-$550 depending on which VDO gauges you choose.
There are a few recommendations from the supplier dependent on what kind of car you have:
E9x 328i - Oil Pressure, Oil Temperature and Voltmeter
E9x 335i (Stock) - 0-15PSI Boost, Oil Pressure and Water Temperature
E9x 335i (Modified) - 0-30 PSI Boost (Or Vacuum/Boost), Oil Pressure and Water Temperature
E9x 335i (Track Setup) - Pyrometer, Oil Pressure and Water Temperature
Installation takes from 4-6 hours and instructions come with the kit when ordered. I was disappointed the instructions are not available online. This would really help those of us considering buying the set who are DIY types to see what is involved.
This is definitely something I plan to do with my car in the next year or so. Hopefully someone on the boards will beat me to the task and post some instructions with photos.
more.
I'm getting a few things for my car this Christmas and one thing I wanted to add to my toolbox is a decent set of interior trim removal tools. After some searching, I found a great set of 10 nylon pry tools from Eastwood. The kit is $39.99 plus tax and shipping is currently free. Looks like a good kit and I saw it mentioned on Bimmerpost from someone doing a full trim replacement on a 1-series. 
