The Leatherman Sideclip is discontinued but you can get the info under "Retired Tools" on their website. It's a little thinner than the PST, so it probably comes in right around 4 ounces. You can find them quite often on auction sites. It has a great clip, too, if that's a big factor for you.
Leatherman sez 5 oz, but slightly thinner because they leave out the awl and file (gnarl

). If anyone can do without these, fine, but include me out.
The LM PST is a nice tool. Those Juicer jobs with the alumn. handles are cheesy. You can easily carry the PST in just about any pocket comfortably. The original PST was right on from the get go. LM should bring it back.
Only recently, I have reverted to a PST, my first multitool. Ten years ago, I thought it was nice enough, but not sufficiently heavy duty, and I would have preferred locking implements. When the Super Tool was introduced not long after, both issues had been resolved, so it was my EDC for several years. The PST became a loaner or for sometime carry, like when traveling to where locking blades are illegal.
For no other reason than a Target blowout clearance price, I picked up a Juice in January '06. It seemed like a good alternative to a similarly set up SAK because of its real, if small, pliers, which Vic didn't offer in that size pocketknife. In practice, though, it turned out to be a disappointment, just not up to some jobs. Trying to cut hard wire sprung the tool, which had to be sent back to Leatherman (and was fixed at no charge). As a comparison, I retrieved my old PST and cut the same wire, but easily.
That caused me to rethink the PST. Actually, I found, It was both handy and capable, stronger than I had remembered, and was easily pocketable. It had most, if not all the implements I would have liked, but at half the weight of my regular EDC, a fair trade-off from time to time.
Another thought: it tickles me that so often when I am dealing with some multitool-related issue, coincidentally a thread on that very topic will appear on this forum. So to all, thanks, but how did you know?