Compound Pharmacies in USA

[Approach]

1) Can I have a compound script for Tirzepatide anywhere in USA? For ex, If my script was written by my doctor in Maryland, can I fill it in Texas?
2) If so, then I assume I can do mail order compound pharmacies in the USA. What are the top 3 mail order compound pharmacies in USA? Ones with all the certifications, etc.
3) If you had to guess, how much do you think they would charge me for 1 month supply of 2.5 Tirzepatide costs?
4) Does 2.5mg Tirzepatide cost the same as 15mg?

Thanks!