Turns out I out-thought myself. I have a locally-owned small hardware store near me called McLendon's. It's wonderful. As close to an "old school hardware store" you can get, while still being a viable modern-day business. We also have Home Depot and Lowe's, which are your typical big-box hardware stores, although Lowe's is less shitty than Home Depot. I knew my local McLendon's didn't deliver, so I ordered from Lowes. They are the ones that told me they'd deliver my block in a MONTH. Yesterday at McLendon's, picking up some little stuff, I see them loading up a truck with blocks... so I ask some questions, and, yes, they DO deliver, and yes, they DO have the block I want, and it is also $.30 cheaper per block! So I called Lowe's and cancelled my order, and went in to McLendon's about 20 minutes ago. They'll have my block delivered by lunch time. TODAY. I may never have to go to another big box hardware store EVER. Yay!