I've been in the parts business most of my life. For a part to be stocked, weather its at the store/warehouse/manufacture, it has to move/be sold several times a year. Interior trim pieces are the slowest moving items there are. When you compare them to service items, its a night and day difference. Interior items are made on a limited run because of this. They only make the color/style piece for a given amount of units. Once the inventory is gone, they sometimes will do a supersession from one number to another but its most likely not going to be the exact same part you need. Seatbelts are an example. When you have an older unit and need a replacement, most likely you will get a belt but the color is different. You have no choice. I try to explain to people another way to look at it. Look at your place of work. You have productive employees and deadbeats. The productive employee is going to make the company money and therefore will be kept around. The deadbeat is going to be watched and most likely launched because they are costing the company money from lack of production. Of course there will be some employers who do the opposite. Your parts are the same way. I used to get people coming in to say that they had just got this item, or that there are tons of these being sold and why don't you have this. They inventory gets tracked. Systems will record the amount of sales and tell you what to stock up on or to minimize amounts. Also it will record lost sales. If you show enough lost sales on an item, it alerts you to start stocking it. If you have never sold it, it is not going to be stocked. You will stock lots of service parts because they sell and no interior stuff because they don't sell AND there are too many variations with color, trim type/style, production date differences etc. Another thing I used to see is when I was at the dealers, you would periodically be able to send back unproductive parts to the manufacture for credit. Some of the items went back to them, some of the parts were under a scrap credit and you actually tossed them in the dumpster. Lots of interior parts. Even the manufacture didn't want them laying around collecting dust. By the way, you get taxed on your inventory. Another reason not to keep the stuff around. Why pay taxes on non moving items?