What about afocal photography? It's not as elegant a solution, but it does work - I've taken a few shots with a PST this way. All you would need is an adapter to mate the scope's eyepiece with a camera lens, and you shoot through the eyepiece.

Will this be your first total solar eclipse? If so, many suggest enjoying the awesome, but fleeting spectacle just visually, and saving imaging attempts for future trips.

Best wishes. Hope it works out.