This is not the place to visit if you want to know from where to buy Mwave hardware.
Unless some warehouse company is dumping Mwave boards, private sales are about the only things you'll find here. The Mwave 5 volt chip & ISA cards are now obsolete, not working in many modern motherboards. There may be an upgrade to 56k modem available from IBM.

All development stopped years ago, but IBM have recently released linux drivers for the Mwave modem in the IBM thinkpad range of laptop PC's.

I can supply a CDROM of drivers for the miro Mwave cards, (version 3.36) for windows for workgroups, and windows 95. £ 6.00. plus p&p. minimum £4.00.