There may be legal reasons as to why this is no longer being supplied.
Reasons Meridian have to comply with and a modified unit does not.
As a DIY solution you can do anything, but a comercial operation, however small may well run into trouble.

Just random thoughts, Cheers, Chris smile

No 18 in the Hall of fame smile I have simple tastes; I am content to settle for the best:
GIK monster bass panels, rear wall. QNAP TVS 471i3. Roon into DSP5200SE via 210/ 218 zone... Explorer 2. Bluesound Pulse 2, Mini & Flex. 596v1, 518, Foxsat HD, Sony BDP, Pioneer 5090, 2 Chromecast's for LRB videos. MS200 to F80 for a Roon zone