The Genuine Tannoy 7900 0227 Recone Kit has been discontinued. (Used to repair the CPA12, replaced the Edinburgh TW 7900 0264 recone kit)
You can use 7900 0441 (below) instead. This kit will physically fit but the sound may be different. It will provide more mids and less bass.
Special order item: If not in stock, lead time is usually 5-14 days.