4Get the cards
Every cell is the full art window of one real card, so you can cut them
out and lay the mosaic up physically. Every printing quoted here is the
cheapest one carrying that artwork.
On: the TCGplayer list sends 1 Gristleback [GPT] 87 — set
code plus collector number, which is as close to a specific artwork as
Mass Entry gets. The number is only included where TCGplayer will accept
it (inside a set's printed run, non-basic); elsewhere the set code goes
alone, because one unmatched line rejects the whole cart.
Card Kingdom's bulk builder can't pin anything — set codes and
collector numbers are both rejected, so it matches on name alone. For
guaranteed art, use the buy sheet below.
At checkout, TCGplayer's Optimize Cart will find the cheapest
combination of sellers — but only keep “current printings”
locked. That's the one setting protecting the artwork; unlock it and the
optimizer swaps in cheaper printings of the same card names and your
image falls apart. Locking the printing already pins the set and rarity,
so those filters just shrink the seller pool and add shipping. Leave
condition wide open and set any minimum as low as it goes — you're
cutting the art out, so damaged copies are perfect and far cheaper.
Want the art to actually match?
Neither retailer's bulk cart can pick an artwork — both match on card
name and hand you the cheapest printing, so a bulk order will look
close but not right. The buy sheet is one clickable link per
printing, pointing at the exact card in the mosaic.