Unless you are lucky enough to find used parts
Gibraltar no longer makes a 1.75" rack. Check with your music stores again and see what they have in their parts books for Roland racks, I'm pretty sure they still make 1.75" systems and you may be able to piece together something that will work... you may be able to get extensions & legs but I'm not sure about the clamps/ mem locks for your equipment.... May be something worth checking into before buying all new.