I know this is an old thread , I too am also searching for a 30 volt DC with more then 0.8A output, most electrical wholesalers didn't even know there was 30v , rang up the Christmas tree company and they pretty much said good luck as we don't keep spares for older stock thanks in advance
good find that CCTV power supply, to add to the list,
i was vacuuming the house a few days ago and i realised my dyson v10 was a 30v unit @1.1A, bought a after market one for 18 dollars and chopped the lead off and soldered the old one on to it and worked thank god, i thought i was going to have to buy a huge variable power DC supply for 80 dollars or so
Application: For Dyson Vacuum Cleaner. SV10:For Dyson V10. SV6: Dyson V6 DC58 DC59 DC61 DC62/SV03 SV04 SV05 V7 V8. The colors may be different as the difference display. Product specifications: Input: worldwide 100-240V 50/60HZ, Output: 30.45V 1.1A with power cord.