Can we order without a power supply? $1,700 for two 1350 W power supplies is ridiculous. Two ATX power supplies with that sort of power would cost on the order of $1,000 less. Anyways I trust my own tried and tested power supplies way more.
You should be able to remove it from your cart - try "none" when choosing your PSU option.
It seems to not allow that for me with the plain HTML store.
I assume this also means plain ATX power supplies shouldn't be an issue.
Edit: It seems to be working for me now.