Where to purchase replacement power supply for 5C?

The replacement power supply for my Drobo 5C is listed as “Out of Stock” on the Drobo store.

My power supply appears to have died. The green light is on on the brick, but no lights are on on the Drobo.

Is there somewhere I can get a replacement, other than at the Drobo store?

Last time I had to buy a PSU, admittedly for an old Gen 2, I just went on ebay/Amazon & bought a generic PSU with the right output rating & barrel plug, I forget now which site, but a quick search is showing units in stock on both (in the UK). Meanwhile since I had access to one I used the tail from the failed brick & a generic lab bench power supply having dialled in12v.

If you want genuine your options narrow.