For info on the Uptone USB regen see here -
Retails at £175, yours for £85 plus £3 postage
Lifting its performance is the SBooster linear PSU (6V-1.25A)
Retails at £250, yours for £125 plus £5 postage
Buy the pair for £200 and I’ll do £5 combined postage
Uptone Audio Regen sold.
SBooster linear PSU available