I use the HD Oasis half cover. Used it for the TG and now for the SG..
Dawco makes a nice half cover but you have to cut a slit for the antenna, not a big deal, have one of those too...the Dawco fits the TG and Ultras better than the Oasis....have a full cover for a trike that I used on longer trips...especially near the coast...blowing sand....would work well in the desert areas too....