SB3 Switching PSU replacement. Opinons?

The usual scare, suddenly the SB3 stops working... Turns out the SB3 was not dead. Only its PSU had decided it was time to go.

Years ago I had the same issue (on another unit), I got a PSU out of AMZN, supposedly "made for SB" and clearly it was not.
More recently (for yet another unit) I made my own USB to barrel connector cable and used an USB power port available next to the SB3. Works fine.

I'm contemplating my options, between:
1 - a USB-barrel cord + some redundant mobile/iThing charger
2 - a Raspberry Pi PSU (pretty good and inexpensive, IMHO) to which I would solder a barrel connector. AFAIK this PSU delivers 5.1V rather than 5.0V

Do you have an opinion or a go-to solution for this? I'm only interested in a cheap and compact solution.

Thanks in advance.