I have seen, and am looking for, something I saw at a company, where they had a stand near some large-format printers.
Basically, it consisted of two pieces of 3/4" plywood, standing vertically, and tapering from about 1 foot wide at bottom to 6 inches wide at top. These had slots cut into them, sloping downward, to accommodate wooden dowel.
These were the sides of the unit, and were spaced apart about 50" (to accommodate 44" rolls), held in place by the remainder of the unit, which was also plywood.
Total height was about 6 feet, and stood on the floor against a wall.
The slots were cut sloping downward so the dowels (and the rolls of paper on them) would not fall/roll out.
This could be built easily at home for very little money.
The other option might be to look for commercial units that might be sold for fabric shops to store their rolls of material.
Hope this helps!
Cheers
Tom