sub-zero

I have been having shitty time with setting up the APEXI single kit. I bought it used but it seemed to be in new condition. The car is will boost to over 20 pounds and the WG will open but creeps like nuts. I took off the boost controller to see if it was the problem and just hooked the bottom to mani. press. but it did the same thing. I took off the WG and blew into the top and bottom hose nipples and there is no resistance, the air just runs through it. I took it apart and the rubber bellows is fine but it seems like there is a sleeve or collar missing around where the plunger enters the sealed aluminum body. Has any one taken there APEX WG apart and can tell Me what is supposed to be in there. I could not find a parts link for the APEX wg anywhere and the guys at APEX intigration USA dont know ****. IS ther somewhere or someone I can send it for service.

Please help!!!!