$100 Disney gift cards are still out of stock online

. How long has it been since they've been in stock? It seems like it has been quite a while.
I don't plan on buying my Disney cards until September (trip is not until mid-October) so I am not sweating it yet. I am fairly certain that even if I went to the store with my $1000 of Target gift cards that I acquired via churning, I would still come out ahead. Yes, I'd be leaving $50 on the table by not buying them online, but that is a LOT of orders to try and get them all in $50 increments.
What would you all do? If you had $1000 in Target gift cards that you wanted to convert to Disney gift cards, and no $100 were available online, how would you plan your attack? If there is a (4) card limit for the $50, I would have to place (5) separate orders, and I would assume that there should be at least 24 hours between each one. That means I would need to start the ordering about 3 weeks before we leave to make sure they arrive on time.