There are different ways of installing a fairing on a bike that doesn't have a 'kit' for mounting it. You necessarily have to fabricate a mount for the frontal area around the headlight area, and at least two side mounts, one on each side. This is minimum. You may find that you will need a couple more mounts as well. On my RD350, I mounted an AirTech Camber Daytona fairing, and went to Home Depot to get some of their nice square tubing, and plate. I took a piece of thin wall 2" tubing, and cut a section out that would form around the neck, and welded a piece of square tube to that, and then a smaller square tube inside it to hold the headlight 'ears' I tabbed out of flat stock, bent up and welded to the front small tube. This allowed me to slide it in and out a bit to get the right length.
You have options as to how to mount with Dzus type quick release fasteners, if you don't mind the exposed screw fasteners (gives it a race bike look) or, you can fiberglass in a mount plate from thin angle bent to parallel the headlight ears. I used thin brackets from the hardware store, probably from curtains, or shelf corners.
Now, the side brackets can be made from thin tubing, welded to thin flat stock and drilled and bolted to an engine bolt, or a frame bolt, u-bolts can also be used on frame tubes. The main point is to find mounting areas that won't interfere with your bike's function, or yours. Then, again, use the Dzus quick fasteners, drilling the bracket with a 1/2" hole and riveting the spring to it in the proper locations. It is quite labor intensive, and accuracy in measuring is Imperative to get a good fitting fairing to your bike. Again, if you don't want the exposed heads, us a piece of thin angle and drill the for the bolt, pin, or Dzus fastener. This is just an example, but I hope it gives you an idea as to what you can do to get you fairing mounted.
Also, about the lead time for them to get you your fairing.. they normally can't afford to keep everything in stock, ready made.. so when you order one, it takes them several weeks of fab work to mould, gel coat, and finish sand all the pieces that make up your fairing. AirTech is no different. My dealing with them had the same lead time from order to delivery. AirTech wasn't 14 weeks, but it was about 5-6 weeks, or more. Patience IS a virtue for a reason...
Charlie