I need a pair of tweeters for M33s.

They are Seas 25tffn/qg H625-06

From searching the internet it appears they are discontinued, and I cannot find any alternative recommendations. The only place I can find with them is Madisound and shipping is too expensive to the UK

Any ideas?

Lounge: DSP5000 24/96, 518
Snug: 518, C61R
Office: M33