Yeah quite do-able if you just want the straps, brackets and fork fixing kit that should save a bit of postage if you want to get a
Clearview screen anyway. I have a Clearview on one of mine with the vent, it is an exact size copy of the stock Roadster one. most people order the bigger versions. I got mine second hand here in Oz and the previous owner had never fitted it correctly and one hole did not align with the vertical strap. I
eventually figured out after it arrived that he had put the wrong vertical strap on one side which caused just the one hole for the other vertical strap to misalign. Swapped the vertical straps over and voila they all fitted perfectly. I confess it took me a while to figure it out as I thought he may have bent one and first tried to re-align myself using 4x2 timbers and car scissor jacks without success

I also have an aftermarket
Memphis Shades top lip and side extensions on the Clearview that I have tried and tested up to 190kmh (118mph) so far, according to my Zumo GPS, with perfect stability.
I'll check out postage this week and get back to you. I have to delve into my shed and re-organise again and already have a set of straps and brackets separated from the screen in there along with a set of used fork fixing clamps.