I do have a set o hippo hand like hand covers and I'm well familiar with hand guards, having them on three other bikes, all adventure style, over the years. I know some have adapted them for Rockets and Vulcan Nomads.
Hippo-hands was the trade name I believe for the covers. If I was a daily commuter I'd use them because not only do they keep the hand warm they keep them dry. I need something less and Bedifferent your wind deflectors seem to fill the bill. Roger on sending me the pattern for the bigger ones but I'm sure those that you made for yours would be just fine.
I had the Triumph lowers on my 07 Classic and they were the tackiest looking add on accessory I'd ever had on a bike. They were mounted with rubber lined clamps an were always coming loose.
I think Triumph go it right with the Touring though but everything could use a wee bit of improvement and with these, making them a bit larger would really help.
I had leather or vinyl "chaps" as they are called on two of my Harleys and now on my Nomad and they are regularly available.
I include a couple of pics just for fun. The first is my good friend Mike, about whom I cannot say enough good things. Wonderful guy. I don't take long trips with him because he thinks nothing of getting on the road at 6AM and riding until 10PM not me. Mike is not one to waste material so he fabricated his crash bar chaps from an old suitcase, cutting out the pattern and affixing it with electrical ties. He's riding buddy is appropriately named Buddy. You can just see the chaps a bit in the pic and like the Touring, the Nomads have effective lowers.
The below pic I post of my friend Jack's BMW R1200C, the James Bond bike, with the Hippo Hand. I took this pic on a ride with Jack before we headed back, he on my Rocket and me on the Beemer. I discovered once we got underway that I had no idea where the turn signals were or the horn. I'd failed to take a peek before we getting starting the bike. Jack is also an Iron Butt rider like Mike and now rides a Triumph Bonneville and his TW200 which has taken him the length and breadth of Baja.