Is there a way to define a custom sprite for a specific item or block using command blocks?

I'm looking for a way to implement custom item sprites in my vanilla world. Is there a way to, say, add a custom sprite to a resource pack and then call that sprite with a command block? I want to be able to have custom items, armor, and blocks that don't look like the generic versions from the resource pack.
Hopefully there is a way to do this with command blocks, perhaps by defining some data tag I'm not aware of when doing a /give command?
Any help here would be greatly appreciated.
Best Answer
in versions before 1.8.3 I know that you could make armourstands with custom playerheads just larger than a block. in the newest versions, howerver, custom playerheads do not work, I wouldnt use new versions for command blocks for several other reasons, too, such as rendomized dispensers.
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How do you make custom items in Minecraft with commands?
Give yourself a Command Block by opening the chat box and entering \u201c/give [your username] minecraft:command_block\u201d Turn on Creative Mode by typing \u201c/gamemode c\u201d in your chat box. Place the Command Block where you want it.How do you give yourself items with a command block?
Using Redstone, Minecraft commands or command blocks allow players to do everything from speaking to exchanging items, to even controlling the weather in their worlds....Weather commands:- Rain: weather rain.
- Thunder: weather thunder.
- Clear: weather clear.
CUSTOM SPELLS, ENCHANTS, AND MESSY COMMANDS | Command Block Tutorial
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