Sometimes these guys are just stupid.
I went through the same issue when I lifted my old Chev truck. He wanted dimensions. I asked if he could make stock ones without dimensions and he said yes. So I then told him make me new ones two inches longer than stock
He was a little pissy at me pointing out his stupidity but he did it.
Ask if they can make stock, when they say yes tell them to make stock minus whatever the block is you are taking out.