Even with all the ammo hoarding lately you should be able to find Speer Gold Dots.
I, personally, recommend the 124 gr standard pressure. In the 50 round boxes it's product No 53618. Usually when Speer sells in the smaller "civilian" boxes it just changes the first number so it would be 23618, but they have been known not to always follow their own conventions.
Frankly, IMO it's no great loss if you can't find the Silvertips. I can see why some gunmakers recommend them because they're slick and feed well in just about anything. However, they don't have a very good rep on the receiving end (i.e. terminal ballistics).