I have a very high quality, new, linear psu of professional quality (originally intended for military grade computers) providing all the voltages you need. I don’t want much for it (£50) but will it fit? I have never had a G68 but it looks as if it will. Let me know (PM might be best) and I can send the dimensions.

Cinema/Music: Trinnov Altitude32 8-16,218,Cloud 4 channel, Marantz UD5007,DSP5200SE(2+C),DSP3300(4),DSW(2),271,MShort Ceilings,AppleTV 4K
TV: Marantz SR7013 Wharfedale Diamond 9x4+Celestion(C)
Music: Roon,i7NUC8gen,QNAP TS253A, Sony Scala, MS200, Garrard DDQ650,Wharfedale Diamond 12.3
Kitchen: AD88 (bluetooth via i80).