Hi, Fairmountdan,Unsure what upgrades you're considering?I myself have no idea to what extent of replacement parts VPI still has available for the 19 Series?Probably, the most important parts that would be maybe needed down the line due to failure, or damage, would be the Motor, Pulley, Bearings/Bearing Wells, Dustcover. Other parts would be the different Arm Bases, etc. Appears belts will be made till the end of time, as other models do use the 19 Belt (Aries 1, Scout, and TNT Jr)Probably best bet would be to call VPI themselves.As far as upgrade packages that VPI used to sell, it appears that none of their Dealers have any left over stock of these items. While VPI doesn't advertise Plinth upgrades, upgrade packages, Armboards etc, these still may be an in stock item? Just maybe not in great quantities?I myself just upgraded my HW-19JR yesterday with a Mark-IV Platter, and Bearing-One Piece VPI Clamp, and replaced the Rubber Feet with Audiopoints from MusicDirect. Was a worthy upgrade! I will shortly be placing an absolute mint VPI-19JR Clear Acrylic Platter-Bearing-Bearing Well, and Stock Jr Clamp, and also a mint Black Diamond Racing two-piece Carbon Fiber Clamp for the 19's on A-gon in the next couple of days. Just haven't quite settled on a selling price as of yet for these parts. Mark