Aluminum Stock (6061 is good)

.5 x 3.0 x 1.0 (2) - Base Legs
.5 X 3.75 X 1.375 (2) - Side Supports
.5 x 4.625 x 2.5 - Generic Top Plate
.25 x 1.0 x 2.0 - Base Retainer Knobs


.5 dia. x 1.0 (4) - Alternate Base Legs
.5 dia. x 1.375 (4) - Alternate Side Supports


Steel Stock (1018 is good)

.5 x 4.5 x 2.5 - Lifting Plate
1.25 dia. x 1.2 - Tophat

Hardware

7/16-20 x 10.0 Threaded Rod
7/16-20 Nut (Auto Wheel Lugnut)
1/4-20 x 2.75 Socket Cap Screw (4)
Compression Spring - .42 OD, .042 wire - McMaster.com #9434K89 (cut to .5 length(2))
Belleville Disc Springs - .453" Id, 1.188" Od, .089" Thick - Mcmaster.com #9712K436 (1) 6-pack
Shoulder Screw - 5/16" Shoulder Dia, 2"l  1/4"-20 Thread - Mcmaster.com #91259A591 (2)