Couple of good deals at Chain Reaction Cycles
Great deal on this, cheaper than used:
Thomson Elite Layback Seatpost - 27.2mm 410mm BLACK 16mm Layback
ID: 26273, Unit Price: 67.96 CAD
If you are placing a CRC order and have free shipping, take a look at:
Shimano Alivio MC18 Rear Hub - 32h - Silver ID: 336171 Unit Price: 7.92 CAD
Shimano Deore Hub Rear M510 - NO QR - Black 32h ID: 341008 Unit Price: 12.44 CAD
If you are running any older Shimano hubs, you are getting the Y3A398020 freehub for less than half price, plus of course the quick release, seals, axle, cones, and bearings may be useable.