As has already been pointed out, actual corporations are probably going to get a good deal on this stuff, not pay full price. Also? Judging from the cops I know, just making the stuff available to them and offering a reasonable discount/payment plan, you'd get guys lining up around the block to get some of this stuff. Lone Star wouldn't have to pay for the smartlink, they'd just have to let their cops buy 'em, and they'd see quite a few beat cops all geared up and ready to rock.
Especially using the SR4 rules, where so much of this hardware is readily available that's just as good as the cybernetic versions. If you're already wearing a helmet, why not get a smartlink and low-light on it, so you can keep up with those tusker punks in the dark? If you're already getting assigned body armor, who wouldn't get a BioMonitor upgrade (for just ten nuyen a month, automatically deducted from your paycheck for your convenience, partially offset by a discount on your company insurance policy!)?
And, the way the safe target and similar stuff works? You can bet there's going to be some peer pressure from the other guys on your shift, for everyone to "buy in" and gear up. You can either shell out a nuyen a day to your payment plan and get that biometic safety and safe target system...or you can get bitched at about it all shift long by your partner, your shift sergeant, and everyone else you work with.