Blaster ROTJ EE-3 Blaster help

Mando Comando

New Hunter
Hey fellow Hunters!

I'm thinking of doing a scratch build ROTJ EE-3 Blaster for my Boba Fett kit, but I'm a little lost on ONE piece. The heat sink ribs along the barrel. One tutorial I read said they used T-Tracks. My problem is, I can't seem to find the right ones. Most if not all are the "U" shaped tracks and not the "T" shaped ones I need.

If you know where I can find them or find suitable substitutes, please let me know