Please add the tier I mat reward to the tier IV rewards for challenges

I haven't been able to do any tier IV challenges in a couple weeks cause I've run completely out of the lower tier mats. Especially the MK3 Arakyd droid caller salvage from the AGI challenges since each toon that uses those needs 20+ on each gear level. But tank challenge is just as bad. I want to be able to do tier IV challenges again.