Rock protection for toad.

We tow a Wrangler, and use an 8' x 6' HD mesh cargo net to cover the nose (lights and rad). It's secured with bungee cords hooked under the Jeep, and through it's numerous brass grommets.
We fold the 8' length in half to 4' of vertical double protection, and place one 6' edge along and and secure it in place just above the knuckles for the tow bar. That covers the lights/rad and the top edge of the hood. The top 6' edge is secured to the outside mirrors, again using bungee cords through the brass grommets and wrapped and secured around the mirror arms.
It cost us about C$45 for the HD mesh net, and a few bucks for the bungee cords at Harbor Freight. HF probably has similar HD mesh cargo nets. We got ours in Canada at Princess Auto.
Princess Auto HD mesh cargo net

Sorry I haven't taken any pictures of it in use. If the weather ever improves....
It's simple and does what the other store bought solutions do for a lot less $$$.
We have towed with nothing and have seen very minimal evidence of stone hits. Maybe we were just lucky?

I use bra's from Coastline RV and Offroad on both my Bus and toad. This is the second coach bra from them, and the third toad bra. If you contact them and they do not have a pattern for your toad or rig, they will make one for you if you bring it to their business. They've done this for me for three covers. We regularly travel to Alaska (7 trips) and the southwest (every year since 2005) and have no issues with their bra's. Yes, you do have to clean behind them, but we have had NO PAINT DAMAGE using these bra's

nothing. no real ding issues.

We use a Protect-A-Tow to protect our toad, but there can be some issues installing one on a rear exhaust DP.