Eleanor Burns had a tv show where she had her son cut a hole in a regular small dining room table and make a bracket shelf under it to hold her machine. Almost any cabinet that will fit in your space will work and possibly even have an airlift added to it. Airlifts aren't cheap, though. $115 was the cheapest I saw.
If you have a carpenter on your payroll, have him build you the cabinet or pick up one that someone has thrown out after a remodel and modify it.
I have a Sauder sewing machine cabinet that I got at Walmart for $75 several years ago. Hubby cut a hole in it just big enough for my machine to sit down in and used a piece of MDF board to make a bracket shelf that is situated just so the machine bed sits level with the top of the cabinet. I can still close the cabinet if I take the machine out and sit it inside, on the bottom shelf. Adding an airlift to it would still be cheaper than a Horn, Koala, or even an Ikea table, though.