We have used and have customers that have used, Astra Lease
https://astralease.com/ (ignore warning about the website, it is safe)
Mike Brannigan at Astra understands kits/rollers, etc. and you will not get the "deer in the headlights" look a conventional banker will give you when you ask for money for a car without a 17 digit WMI VIN and tell them it is a "roller"