Upgrading to vented front discs

Hi

I live in Abu Dhabi and my Defender 90 TD5 gets to do a lot of highway driving as well as sand driving. I want to replace the solid front discs with vented ones to improve braking performance.

Does anyone know the specifications for the spacers that needed to be fitted to widen the callipers so that I can have them made locally?

I've got a spacer kit sitting on the desk next to me (should be getting around to fitting it to the 90 in the next week or so) and it is more than a couple of spacers.
There are the four steel spacers, four alloy shouldered sleeves, eight seals, replacement bolts & pins.

In the UK the kit is about £50, isn't it worth buying one and getting it sent over?

sounds like a good plan.... Thanks very much. I found out that Scorpion racing sell them