Get some acrylic (UsPlastic) and cut it yourself (guide here) After all, mobo layouts can vary. While the guide deals with completely acrylic cases, it does have a section on motherboard trays with some measurements.
Build your own! I wrote a guide about this that maybe one day will be published on Creativemods.com Anyways its as simple as this cut the plexi to size (major hardware stores usually do the first few cuts free!) in my case I wanted it the same exact size as the mobo 220mm X 244mm here's an old trick I learned, take your mobo and put it over your plexi, exactly how you want it. Now get a sharpie and drop it into each of the screw holes, it just barely fits and gives you a nice mark at the center of each one of em. tape your mobo if its jigglin. Next drill each hole out finally mount as prefered. I used 1.5" bolts and washers. You don't need spacers if your tray is plexi hope that helps!
I know I could just cut a piece of plexi and make it myself. I just figured it be easiest to buy it. Neways off planning again...
www.clearpc.ca makes them amung other things. But they are located in BritishColumbia up here in Canada.
Honestly I wouldnt even buy one or make one I would just take some clear caps and set the motherboard directly on those which I would glue in place. That way it would take up and use less space since I imagine this is probably a small cube? If its not than I suppose it wouldnt matter, but for me space is everything. SO to draw a better picture I will draw one |==============================| Wall I want the motherboard on 0 0 0 0 0 0 Motherboard goes here: Ya know I mean it doesnt have to have a tray if ya dont want it to I dont honestly see what it would need one if you use proper materials/
