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: DSP5200, 518
Snug: DSP33 x 5, 518, C61R
Office: M33, 561