Here are some fairly inexpensive racks, you can probably find others similar to these if you search (unfortunately "rack" is not a great keyword, so add qualifi

Here are some fairly inexpensive racks, you can probably find others similar to these if you search (unfortunately "rack" is not a great keyword, so add qualifiers like "19 inch" or "relay rack" or "EIA"): https://www.connectzone.com/data-racks.html https://www.connectzone.com/data-racks.html If you only need a small one there's lots of things like this (both straight and angled): https://www.amazon.com/gp/product/B004THBHR0 https://www.amazon.com/gp/product/B004THBHR0 When buying a full rack you have to be careful because there are two incompatible standards, older racks meant for telephone companies and racks meant for music and electronic gear. They have different spacing for the holes. If you get the wrong spacing you can still use it, but you'll either have to drill and tap your own holes or only attached your rack mount gear at the bottom with one screw on each side, rather than two screws on each side and there may be some small gaps between equipment. I think (but do check) the home audio gear compatible standard is the 19 inch EIA rack with 1.75 inch spacing: https://en.wikipedia.org/wiki/19-inch_rack https://en.wikipedia.org/wiki/19-inch_rack Don't forget the accessories, sliding drawers, shelves, screws, sliding shelves, etc. The cheapest racks are designed to be screwed/bolted directly into the floor, but you can bolt them to some wood such as 2x4's to create a base to make it freestanding. All the weight mostly goes behind the rack so the base should mostly extend to the rear (but also somewhat forward, you don't want all your gear falling forward onto the floor either.) Sliding shelves and drawers can shift some weight forward, so plan for that depending on what is placed in/on them.