I bought a Trek Bruiser 2 on craigslist last week and I'm planning to work my way through the bike and replace all of the Bontrager stuff. Stem, bars, saddle, cranks, and steer tube cap seem like they will be pretty straightforward. But the seatpost is stamped 29.2, and there aren't hardly any 29.2 seatposts out there and the ones I found are from no-name brands. Can anyone suggest a reputable brand that makes a 29.2 that is at least 350 mm long? Does anyone have any advice on shims?