I really think all the major OTC synthetic brands, will have a 0W-20 product aimed at the hybrid vehicle market.
While definitely not a large market segment, this type of product is just "red meat" for press releases and is the type of cutting edge technology that typically generates the sidebars & glossy prints for the corporate annual reports.
Hybrids oils will get here on demand. Smart stores sell oils that the public desires to purchase in volume. No room on shelves for items that grow dust.
Pennzoil is prepared to sell 0W-20. Al they need now are customer complaints to the retail auto parts stores about unavailability.
You need to contact Shell by mail, phone or email in order to find a retailer that has it (perhaps 50-100 miles away from you).
I see Mobil-1 0W-20 gathering dust in some places. That's not a good sign more 0W-20 labels will follow this year.