They are 3mm, right?
How much will I need to replace them all, ~10ft?
rubber or silicone?

Friendly local auto parts store

Thru McMaster Carr
(they are in Atlanta, but I don't think you can pickup...usually received within 2 days of ordering)
5394k14
$1.48 per foot
10 foot minimum
10 feet will be plently for all lines

I'm not sure how the rubber lines would hold up under the high heat in an engine bay. I try to use better stuff so I don't have to go in there more often.
&lt;I heard BMW has some vac hose that does not require clamps...have not researched it yet, but it sounded interesting...&gt;<ul><li><a href="http://www.mcmaster.com/">McMaster Carr</a></li></ul>