Renting Challenge Car at National Meet

I was planning on attending the national meet and showing my 328 in the concours. I was also interested in participating in the track days and was wondering if anyone would know of any 355 Challenge cars that may be available to rent for the weekend? I am just looking to have a fun car on the track and I would imagine I would be placed in the intermediate run group given my lack of recent experience. My previous experience consists of PCA and NASA club racing events in a 911 and after campaigning a full race car on the track, I have no desire to drive any of my street legal Ferrari's on the track --- even in a Ferrari, a street car is no comparison to a dedicated race car. It has been almost ten years since I last raced, so I have little recent experience but I did do a few laps in a 430 Challenge car a few months ago and it wet my appetite to dip my toe back into the track game. I also have a potential purchase of a 355 Challenge car in the back of my mind, so renting one for a few days would be the ideal scenario for me, especially since I used to own a 355 Berlinetta so am somewhat familiar with the car. My plan was to approach the usual suspects such as Universal Autosports, but any other leads would be much appreciated.