John, you might want to consider building your own moulding racks. That would enable you to have precisely what you need, and it would probably cost less, including a fair allowance for your labor.
I prefer horizontal moulding storage. Here is a drawing (JPG and PDF, but the PDF file might be clearer) of a free-standing moulding rack I planned to build. Access would have been from either end.
View attachment Drawing-MldgRack58Gutters.pdf
For vertical storage you could build a similar rack, except with the gutters mounted vertically and placed at an angle of about 20-degrees. That is, make it an A-frame rack. I did exactly that in my original store and used two of those racks for 14 years. Each rack occupied a 10 ft. x 2-1/2 ft. floor space, approximately.
Instead of building the rack in the drawing, I decided to save my floor space. Sixty 10 ft. plastic rain gutters from a local home improvement store (about $5.00 each) are screwed to a wall in our back room. They occupy a section of wall that is 20 ft. long x 10 ft. high starting 18" off the floor. It took about a day to do the work. A ladder is required for the stock higher up, but we can store about 50 to 80 feet in each gutter. That gives us capability to keep about 3,500 to 4,500 feet of moulding, which is plenty of moulding inventory for our little shop.
