We are all ticket now
You can buy it from this link, you should be emailed a PDF file with a QR code but I'd recommend letting the page refresh to the success page as we have had some instances of the email not appearing recently, you can download it direct from that page.
Wouldn't recommend buying on the day!
Your link:
https://tickets.ayrunitedfc.co.uk/package_link/221/RCaway