I've have the same seller bookmarked for a 100' coil. I tried to buy local but no one here handles pex-al-pex.
My run will be 25' exterior and 25' interior. Are you rolling your own insulation? How deep are you planting it?
I'm going to wrap the two pex lines in foam pipe insulation and stuff it into a 4" tile pipe or PCV (the run is so short).
I cut the slab today. Will begin the trench tomorrow. Ahhh...the glamorous work
Probably ought to buy the pipe