For the Fastly shared certificates there are two options:
Shared single SAN entry and a shared wildcard SAN entry. These are priced on https://www.fastly.com/pricing
For a single shared entry you get 1 specific entry such as aaa.com which would not include subdomains including www.aaa.com. Or you could have www.aaa.com and not aaa.com.
For a Shared wildcard SAN entry you would get *.aaa.com + aaa.com . This allows for www.aaa.com, blog.aaa.com and so on. Please also note this is to one subdomain level so you could not have *.images.aaa.com unless you purchased a wildcard for that subdomain level also.
In your case it looks like you need multiple TLDs on a certificate for a similar name. In this instance I would recommend our hosted or managed cert options where we either procure a cert for you or you provide us one. We then host it on our CDN network. These options are priced through firstname.lastname@example.org as you can configure them to your specific requirements in a variety of ways. SNI, Dedicated IP, provided, procured etc