I can't help with your specific request, but here's what I did, for under $100.
I purchased two 2-door closet cabinets from the closet organizer section at Lowes. Made by ClosetMaid. At the time, they were about $30, now are $38. They are taller than you'll want, unless you are very tall, so need to be "trimmed" down on the bottom - but not all the way flush, or the doors won't open. Face these with the doors OUT, not facing the front.
Top with wood cut to the width you want and depth of the cabinet. Turned as described above, cabinets are 24" deep; the piece of wood I had cut is 4' x 2' - it is 3/4" thick but I don't remember what kind of wood it is. Not plywood, as that is too rough.
Had DH cut space for my machine with acrylic insert, and built shelf underneath to hold machine.
The cabinets I used
http://www.lowes.com/pd_39666-76182-...er+2+door&pl=1¤tURL=%2Fpl__0__s%3FNtt%3Dcloset%2Borganizer%2B2%2 Bdoor
Picture - be warned that I am not neat when I work. Plastic cabinets underneath, with curtain on tension rod in front of them to cover some of the storage; when I am sewing, I don't sit close enough for my legs to go under that far so am using the space!