Remington makes bolt actions with irons. So does Savage. Browning's BLR is a modern lever action that works like a bolt internally, and can handle .308 and a lot heavier even. It also comes with irons.
You can have them added to just about any rifle. Marbles makes them.
There are a few reasons you won't see many in stores:
1. A stock set up for irons is not set up for a scope, and vice versa. Probably 99% of bolt actions get scopes, so knowledgable buyers tend to want a stock that's made for a scope, not irons.
2. Modern scopes are very reliable, and variable scopes allow for close and distant use. For hunting, modern rifle rounds are wasted on irons. Why get a 400-yard elk round and use sights that aren't good for much past 150? You'll note that lever action .30-30 rifles still come with irons. The .30-30 is not a long-range cartridge like the .300 Win Mag, and it's a better match for irons (although serious lever action shooters generally consider upgraded iron sights to be part of the purchase cost of a rifle).
3. Open sights suck. Peep sights, OTOH, are easy to use with excellent accuracy. Competitive iron sight rifle shooters use peeps unless rules prohibit them, whether they're at Camp Perry, the Olympics, or at a local range. You'll also notice that militaries that have been serious about marksmanship haven't used anything else since WW I. The Enfield No4, the M14, the M16, they all have peep sights -- of course our current fighting forces are using optics, mostly, with peeps as backups. The problem is, hunting bolt guns have been supplied with open sights, and seldom good ones. Nothing will drive you to using a scope quicker than those things. Before scopes were reliable, books were written about hunting iron sights, and people knew what to look for. Now, it seems the lever gun fans and black powder cartridge shooters are knowledgable, but a lot of bolt gun buyers have never even seen good iron sights, so they wouldn't know where to look.
