1. Like you said, you can buy from GoLite (and maybe also BD) an item that binds the two trekking poles together. Haven't used it so I can't testify as to how well it works.
2. What I use for the similar pyramid/tipi-type shelter, GoLite Hex3, is 3 velcro loops. Two are relatively short. The third velcro loop is long for vertical height adjustment purposes. I bought the velcro in bulk from REI. REI is a good source of velcro, webbing, toggles, buckles, etc.
Each loop consists of a hook and a loop section sewn together so that minimal overlap is required to connect them together securely. The other ends of each loop are loose and are used for adjustment and binding purposes.
I use fixed length CF poles (more on this later). Though you could do the same with adjustable sectioned CF or Al poles. The only difference will be in dealing with the third velcro loop which is responsible for adjusting the vertical height of the trekking poles bound together by the first two velcro loops.
Two of the velcro loops bind the poles together axially at any location at which the two poles overlap. The third velcro loop is passed through the wrist straps of the trekking poles after the two poles are bound together by the other two velcro loops. The third velcro loop is long and allows height adjustment, though if you are just pitching to one height you could make this third velcro loop the apppropriate length and mark it (e.g. by sewing contrasting colored thread through it so that you can easily see how much overlap the velcro requires for the proper pitch height. In any case you will experiment at home to get the pitch height proper. You will slide the poles until the third velcro loop through the two wrist straps is taught and bearing load vertically.
If you use trekking poles without wrist straps, then the third velcro loop will have to be long enough to reach the top of each pole handle. Bind the third loop tightly near the top with the two shorter binding/joining velcro loops. I haven't tried this yet for a full night. Just a test setup in the yard. So, I can't say how this will hold up throughout a night of wind gusts. As long as that long third piece of velcro stays on top of the trekking pole handles, then it should work - that's the point of binding it close to the grip tops with the two shorter pieces of velcro. The velcro is wide enough that I'm guessing that it won't wiggle off of the top of the pole handles. I try to bind it so that the distance from the tops of the pole grips is less than the width of the velcro. This should make it extremely difficult for the velcro to slide off of the tops of the grips during a night of gusting wind.