I found
this 300W Lite-On PSU. It was destined for a Compaq server, which is kinda neat. But...
Since I'm doing the slimline mod, I'm worried that this "heavy" PSU wouldn't be mod-able.
On special, for a while at 18.99, or 2 for 36.00 (USD). I'd be ordering 4, holding on to one as a spare.
Note how the above reseller
rates the PSUs according to weight (!) and how this unit has already been stripped of a couple of extras (volt switch and, I assume a fat transformer).
An interesting theory...