i put the below list together based on actual experiences of shelby owners here and at the fordgt500 forum. YMMV but this is what actual owners have used and recommended:
Reliable Carriers
Intercity Lines Inc
Montway [@Goose17 choice]
TCI logistics
Nationwide Auto Transportation
Fountain...
just to chime in, i found this 2020 base black with white POTS and 4k miles for $4k under msrp...being white POTS i think it's a good price...passing along to anyone interested...
https://www.hellerford.com/inventory/used-2020-ford-mustang-shelby-gt500-rwd-2d-coupe-1fa6p8sj8l5504559
yes it is covered, a number of people have gotten theirs already. for me it's been exactly 4 months, still waiting for refund check from dealer. told me today that Ford has approved it but they're so backlogged we just have to wait. I told him that's ridiculous I've been waiting 120 days and...
i did 70% on my 350R and now the same on my 500. i like 70% it's a good balance, not too dark but helps a lot. the windows are 35%. this picture gives you a feel of the transparency...
btw, one thing is i dont want the SVE caps. someone recently got these exact wheels and said these fit perfectly...
https://www.amazon.com/dp/B0B8QN65DM/?coliid=IPXPKVOQNTP0N&colid=2Z3NBAPS2PT6H&psc=1&ref_=lv_ov_lig_dp_it
edit: my bad i forgot it's the shelby snake logo!