Not everybody has eBay.
And that's beside the point, customers shouldn't have to spend a single extra cent to purchase an accessory that the product should already come with. If my Devastator came missing anything, I'd be calling TakaraTOMY's customer call centre ASAP and getting them to deal with it.
When I got MP01 Masterpiece Convoy it was missing one panel. I called Takara's customer call centre and they FedExed me replacement panels and some Transformer freebies as compensation for my inconvenience. But that's the ONLY time I've ever had a Japanese Transformer come with a missing part - and to Takara's credit they were just fantastic in handling my concern.