SusInsert

Insert items in sand and gravel with a dispenser to bury an item and turn the block into their suspicious variant.

Just point a dispenser into a block of sand, put items in the dispenser and activate it with redstone.
The block of sand will be changed into suspicious sand and put the item which would have been dispensed inside it. This item can be brushed out of the sand in vanilla minecraft.

This works for items with nbt data too.
This works for any BrushableBlock. So gravel would also work, but also other modded blocks that implement a BrushableBlock.