Ok, detoured by the Newnan store today. They have a lazy susan for the 2-2-2-4 MHF spool, but no spool, just a 30 foot section of remnant taped up laying on the spool spinner. Hopefully they have more on order. This is the stuff like I show in the blow up above, that is rated USE-2/RHH/RHW and can be used to enter a building.
I know you said you were going to splice it outside the house, but also you won't be able to enter the garage with it. Sounds like a lot of boxes and splicing and large expensive wire splicers. The MHF is a nickle a foot more expensive, Thats not much money given what you will spend on boxes and splicing devices.
The MHF will do everything the URD can do, and more.
I'd give Newnan a call and see when they expect to have more in, or call a store closer to you and ask for the wire by the HD stock number 462-714 (priced by the foot) or 464-762 (priced by the spool). Don't depend on what the web site says, call and ask for electrical and have them check the spools and shelf tags.
Charles