Beovox M70 is a wonderful speaker but a headache regarding parts.
Several changes of tweeters and woofers (and with them crossovers) in production has been noted.
Serial numbers has been noted both with 6 digits and 7 digits.
The dome-midrange is the same but there are no other common drivers to the M75, I'm afraid.
The woofer will have to be refoam'ed, depending on the exact type used in your speakers, you will have to measure the actual sizes to find surrounds suitable for the repair.
The "filler" (or cone midrange) is often looking as if it was cracked around the surround. Don't touch it, leave it as-is and it will play for many years to come.
The tweeter is either a SEAS H-086 or H-107 (which BTW is 6 ohms!).
I don't have a lot of M70 drivers, they are a pretty rare sight but
if you'll me know the serial number and/or types of drivers you need, I will
take a look.
Martin
PS: To prevent spam, I put on my moderator cap and removed your email address from your post. I have it in case someone needs it.