Like Bart's first post in this thread, I like BoltDepot
http://www.boltdepot.com Here are direct links to Stainless steel versions for most of the hardware called for in the current 2.x BOM. (It would be best to double check with the current BOM before ordering). There are a few things you'll need to find elseware, mostly the correct sized nylon spacers.
FHMSM510S - Flat Head Machine Screw M5 x 10mm (8)
http://www.boltdepot.com/Product-Detail ... oduct=5123FLW04SS - Flat Washer #4 Std Size (18)
http://www.boltdepot.com/Product-Detail ... oduct=5563FLW10SS - Flat Washer #10 Std Size (94)
http://www.boltdepot.com/Product-Detail ... oduct=2946HN0440NL -Hex Nut #4-40 Nylon Locking (12)
http://www.boltdepot.com/Product-Detail ... oduct=4107HN1032SS - Hex Nut #10-32 Std Size (6)
http://www.boltdepot.com/Product-Detail ... oduct=2561HN2520NLT - Hex Nut #1/4-20 Nylon Locking Thin (4)
http://www.boltdepot.com/Product-Detail ... oduct=7721HNM5NL - Hex Nut M5 Nylon Locking (20)
http://www.boltdepot.com/Product-Detail ... oduct=4794PHMS025610S - Pan Head Machine Screw #2-56x5/8 (10)
http://www.boltdepot.com/Product-Detail ... oduct=7656PHMS063206SEM -Pan Head Mach Screw #6-32 x 3/8 SEMS (3)
http://www.boltdepot.com/Product-Detail ... oduct=1335PHMS063206SEM (separate washers) - Lock washers external tooth (3)
http://www.boltdepot.com/Product-Detail ... oduct=4076PHMSM308S - Pan Head Machine Screw M3 x 8mm (2)
http://www.boltdepot.com/Product-Detail ... oduct=6831PHMSM310S - Pan Head Machine Screw M3 x 10mm (10)
http://www.boltdepot.com/Product-Detail ... oduct=6832PHMSM508S - Pan Head Mach Screw M5 x 8mm (4)
http://www.boltdepot.com/Product-Detail ... oduct=5175SHMSM330S - Socket Head Machine Screw M3x30mm (4)
http://www.boltdepot.com/Product-Detail ... oduct=6385SHMSM510S - Socket Head Machine Screw M5x10mm (184)
http://www.boltdepot.com/Product-Detail ... oduct=6407SHMSM512S - Socket Head Machine Screw M5x12mm (34)
http://www.boltdepot.com/Product-Detail ... oduct=6408SHMSM514S - Socket Head Machine Screw M5x14mm
(these are 16mm so they may need to be trimmed) (7)
http://www.boltdepot.com/Product-Detail ... oduct=6409SHMSM525S - Socket Head Machine Screw M5x25mm 8
http://www.boltdepot.com/Product-Detail ... oduct=6411SHMSM530S - Socket Head Machine Screw M5x30mm 7
http://www.boltdepot.com/Product-Detail ... oduct=6412SHMSM535S - Socket Head Machine Screw M5x35mm 9
http://www.boltdepot.com/Product-Detail ... oduct=6413SHMSM545S - Pan Head Mach Screw M5 x 45mm
(these are Socket Head instead of Pan Head) 1
http://www.boltdepot.com/Product-Detail ... oduct=6452SLW04SS - Split Lock Washer #4 (8)
http://www.boltdepot.com/Product-Detail ... oduct=4070SLW10SS - Split Lock Washer #10 (10)
http://www.boltdepot.com/Product-Detail ... oduct=2955SN1032SS - Square Nut #10-32 (6)
http://www.boltdepot.com/Product-Detail ... duct=11933THMS044008S - TRUSS HEAD SCREW #4-40 x 1/2 (14)
http://www.boltdepot.com/Product-Detail ... oduct=6904THMS063204S - TRUSS HEAD SCREW #6-32 x 1/4 (10)
http://www.boltdepot.com/Product-Detail ... oduct=6908