Battery pack for Ryobi cordless drill.

Today I brought a used Ryobi cordless drill for 10$ without battery pack and charger. battery packs are expensive and I decide to build pack myself using 18650 batteries.
But I have no Battery pack holder.

Anyone using these drills?
I’m looking for empty / dead battery pack to rebuild.

Drill model is LCD1402
Battery pack - 14.4V