I haven't seen a Speer bullet for sale in a long time.
It's been awhile up here too. For whatever reason, Speer made a bit of a comeback. One online store I frequent has 30+ Speer bullets listed in stock. Prices are reasonable too, which makes a difference. I got the last two boxes of 46 gr .224 bullets they had. More are on order. The title of this thread concerns 45 gr bullets in the Hornet however.
X-Reload in Canada sells the 45 Speers (SP-1023) for $20.49/100. Midway has them on for $13.99/100, regularly $15.99/100 The attraction is the price.
The cheapest 40 gr. .224 bullet up here is the Speer that also retails for $20.49/100 or .205 apiece. Next is the Hornady 40 gr. VMax. They are almost twice as expensive at $95/250 or about .38 cents apiece. I don't hunt ground squirrels - we don't have them - but for anything else, the price difference isn't worth it for me.
It could be that Speers are hard to find because shooters are constantly buying them up. I know my main supplier goes through a ton of them.