Aero cool tends to be overpriced
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For cutting holes in cases, most modders recommend a jigsaw, with a high tooth count metal cutting blade (18 teeth per inch or more) make sure you turn off pendulum action (it's good for helping keep cuts straight on soft materials like wood, not on steel)
For mounting a window/mesh I still like nuts and bolts, drill holes around the edge, put the bolts through threads inwards, then a washer and nut on the inside.
Use U channel to line the cut edge to help hide wobbliness.
I don't do large or square windows so a rotary tool is fine for me (also I'm not that good with a jigsaw)
Alternately remove the side panels all together, drill holes in the frame, tap them with a thread tap then just bolt the mesh on instead of a panel.
Modding is often just limited by you imagination, a pc case is just a box with a few fittings in standard specifications (things like motherboard standoff spacing, pci slots, drive bays)
SSD's can be mounted almost anywhere with simple double sided velco tape, no moving parts + minimal heat means they don't really need anything special in the way of mounting.
If you really want standard mounting then you can get simple 2.5" to 3.5" adaptors so they can be put in any normal 3.5" hard drive bay
http://www.scan.co.uk/products/akasa...rnal-drive-bay