Hi,
Found some on Ali express.
You might need to check to see if they’re suitable (4ohm 5w 2.5 inch).
https://www.aliexpress.com/item/1005006838558662.html?spm=a2g0n.productlist.0.0.d628165162jIEr&browser_id=84993585d8e043d1bb91b7c1c70e263b&aff_platform=msite&m_page_id=dedbbbcceb19129d6d9711761674bc1e0a91ce1efa&gclid=&pdp_npi=4%40dis%21AUD%2110.26%219.48%21%21%216.59%216.09%21%40210307c017229838318991132e0d84%2112000038469388957%21sea%21AU%210%21ABX&algo_pvid=b59c68fa-7f2c-44d9-8289-d05d503d5609&_universallink=1&m_page_id=dedbbbcceb19129d6d9711761674bc1e0a91ce1efa
There are manuals available for download at Tivoli Audio if you’d like to grab one too.
Hope this helps you to find what you’re looking for.