Another quick cheap alternative,
*** BM bumper is far superior and their stuff is awesome, but if you are in a pinch or tight on cash you can also use a stock CAT M series bumper to stiffen bottom curled edge of tunnel***
I get take off bumpers from Cat dealer for $20.
They are strong.
They have all the main colors.
Run all the way along tunnel to running boards.
One piece extruded design so no welds.
Clean look.
All rivets are from inside out so no hardware showing.
Stock rivet holes on curl can be used.
Can install to leave a bit more room for large gloves when lifting.
Do you have more pictures of that sled? Looks like it has been "de-stickered". You can PM me if you would like as to not derail this thread...