AIMSurplus has Wolf steel-cased for ~$11 per box of 50 (
LINK). I prefer brass, but given the situation we're in, I don't think my G19 range pistol will complain too much if it has to subsist off dirty steel-cased ammo for a bit. I ordered just 600 rounds, but at the rate I've shot since the pandemic started, that'll last me for about a year. I've gotta budget for my pre-election mag buying spree too. The Mag Shack has pretty good prices on HK pistol mags right now and some Glock mags in stock too.