Saw that The Little Toy Company on eBay has both Battle Core OP and Menasor on their storefront.

Confirmed with them that Menasor is of the 5xxxx production code, so they have the revised hips.

Previously ordered Wave 4 CW (Optimus Maximus limbs) from them (among a fair amount of other stuff) and am happy to recommend them - quick responses to specific questions (such as the product code).

Ships from Melbourne and I believe has local pickup as an option.