Does anyone know any venders that still sell a rebuild kit for ac servo. I understand the kit come with aluminum body and some seals. Would this fix the problem. What else can go wrong internally that cannot be rebuild on the ac servo? Is anyone out there try to rebuild one themself. Does it work and how long it last? I don't see a reason to spend $320 for a rebuild one and $800 for new one. When the old one leak does it ruin the internal components or it should be ok? Would it be worth it to spend $320 for rebuild or $150 for the rebuild kit?