I used Delta for my 2013 E70 with 45K miles. I got another 100K / 5 year warranty with $0 deductible for about $3,000.
https://deltaautoprotect.com I used them once and was completely satisfied with the service.
They even wrote a policy for my 2004 M3 with 70K miles. I got another 50K or 3 years for $2,700