Looking for a replacement speaker for Roland MA20 active monitor

[Katch]

I've got this vintage MA20 Roland studio monitor and the driver is chirping and distorting like a cricket 🙁

I've tested out of the unit on another amp to check it's definitely a faulty speaker and it is. It measures 7.5" diagonally from mounting hole centres. 4ohm 15w printed on the back of the magnet.

Can anyone recommend a suitable replacement available in the UK/EU?

Thanks in advance.

 

[duncan2]

Cant find a replacement but a guy in Somerset is selling one for £40 (approx ) on eBay.