Weekend Medical Insurance for the US

I have a couple of bikes better suited to AHRMA, as they are outclassed in VRRA, so I may enter a few AHRMA events next year. For example, my FZ600 is classified as P4-F2 in the VRRA and must race against FZR600s with almost twice the HP, but it is quite competitive in AHRMA Next Gen Lightweight Superbike.

Can anyone recommend an insurance provider that offers weekend coverage for amateur motorsports events? Unfortunately, my standard policy does not cover them.