Read the robot rules about purchasing parts, but my understanding is that you can order the parts from the distributors. Just make sure that the parts you order are legal for use on the robot! for example, only order pneumatic cylinders which are listed on the "free cylinders" page in the
2008 Pneumatics Manual. This means that (for example) you can buy a 16" long cylinder from the distributor, but since it is not listed as one of the available cylinders on the "free cylinders" list, you cannot use it (per Rule <R89>)