Upholstery foam question

[CG]

Normally I would just PM GOM but thought others may wonder too.

Id like to finish up the bench seat Im putting together while we still have warm weather. Full foam bottom, hounds tooth bench. The bottom foam is in pretty nice condition. It had a smallish crack on the drivers side. I cut it clean on both sides and filled and glued the crack with a thin chunk off another seat foam I had.

Ive seen several seats done that the person has put an inch or so thick piece of foam over the stock foam, bottom and back. Seems like a good idea, just wondering what I should be asking for when I figure out where to buy it. I want to find it local not online.