I haven't come accross any A-pillar pods personally. I think maybe thats because the A-pillars in the
Mk2 Leon are fabric so would look a bit pants. Alternatively you could mount a gauge in your drivers side heater vent as shown
HERE
Another option is the Liquid gauge which is due to be released for the petrol
Mk2 Leon later this year which has many handy options built in. I think Awesome Gti and Badger 5 can supply these. Check
HERE for details.